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#1 |
Registered User
Join Date: Jun 2018
Location: Texas
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Re: 1968 GMC - Ol' Blue
Awesome
![]() And I agree with sprint, seems it would ride more comfortable. .
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TA_C10 Stage 1 build - http://67-72chevytrucks.com/vboard/s....php?p=8333444 "It's only money". ![]() |
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#2 |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
We got quite a bit done Saturday. We swapped out the drop leaves and installed new u-bolts (the old ones were pretty cancerous). Measuring from axle to frame, it dropped about 3" which is less than I expected, but I'm happy with where it sits now. I looked at moving the upper shock mount to the rear hole, but it looks okay. We test fit a bedside and I decided to cut another 1/2 coil off the front so it sits down in the front a little bit. My dad got a new set of wheels and tires on his truck so I put his old set on my truck and they actually look pretty good.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#3 |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#4 |
Registered User
Join Date: Jun 2018
Location: Columbus
Posts: 95
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Re: 1968 GMC - Ol' Blue
Were you able to figure out the issue with the belt jumping a rib on your dads truck? Im having the same issue; belt jumping a rib on the ac compressor with kwik bracket.
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#5 |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
So he bought a laser pulley alignment tool (worth the money) and we checked every pulley and the only one that was out of alignment was the power steering pump. We had replaced it a long time ago but the pulley wasn't pressed on the pump shaft far enough so we pressed it on as far as it would go but still wasn't quite enough and there was actually some axial play in it. So we replaced the pump and it lined up much better and we put on a new belt and no issues so far. Whether the power steering pulley had anything to do with it is unknown, but it's running great now so we're happy.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#6 | |
Registered User
Join Date: Jun 2018
Location: Columbus
Posts: 95
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Re: 1968 GMC - Ol' Blue
Quote:
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#7 |
Senior Member
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Location: Western Colorado
Posts: 1,165
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Re: 1968 GMC - Ol' Blue
Well what are the chances! Glad to hear it was an easy fix.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#8 |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
The process of making an aftermarket bed assembly work has begun. We got the floor, front panel, sides, tubs, and tailgate all put together. A list of the modifications:
-Trimmed 3 out of 4 front/rear edges of tubs. They were pretty wide and were resting on the ridges in the bed in most spots. -Elongated the holes in pass side tub where it bolts to the bedside. The whole tub needed to move about 1/4" rearward to get holes to line up with the floor. -Elongated the top two holes in the front end of the bedsides where the bolt threads into the captive nut of the front panel. -Trimmed excess material from the tailgate so the linkage could fold up completely. -Cut and rewelded the pockets in the bedsides where the rear cross sill slides into. -Elongated a couple holes in the tubs/floor so they would bolt up -Trimmed excess material from driver bedside where front panel curl slides into the bedside. Not trying to steer anyone away from buying an aftermarket bed, this is just a list of what I encountered and I don't think any of it is unreasonable. It's just what you have to do with aftermarket sheet metal. I still have to fit the skirts, those will take some modification too. So we got the bed set on the truck and man are the wheel openings on these trucks huge! I'll have to do something about that down the road because these tires are way too small. I could easily fit 20's with low profile tires.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#9 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,989
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Re: 1968 GMC - Ol' Blue
potter,
hi! very nice build.. I have a couple questions for you related to your fans setup. according to post #160: "...Also got my fans and fuel pump wired up and running. I used the GM 3-relay setup for the fans so they both run half speed when the PCM calls for low-speed and they both run full speed when the PCM calls for high-speed. This is a fuse block/relay setup I got from Amazon for $30. I looked at the Bussmann setup and it's nice because it has internal bussing to make wiring a little easier, but I would have spent over $100 because there is a minimum quantity of seals and terminals so I would have ended up with hundreds of them that you don't use. This block worked pretty well - I soldered the 10 ga wires to the terminals since they weren't big enough to crimp. Other than that, the seals fit tight and I'm pretty happy with it. Don't mind the labeling on the wires, we just used leftover wiring from my AAW harness to match the colors used in the GM diagram." did you use any of the factory wires (factory harness) for your fan connections? if so where and how did you located or tied into them? I am wanting to do the same setup in my '86 with a 2013 4.8 and complete factory harness. thank you for your time & sharing your build!! ![]() |
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#10 | |
Senior Member
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Re: 1968 GMC - Ol' Blue
Quote:
The wiring for the fans and fuel pump is pretty much isolated to the engine bay. Since most EFI fuel pumps and electric fans require more amps than the circuits in these old trucks can provide, I didn't use the fuel pump or fan circuit from the chassis harness. Instead I took power straight from the "disconnect" - it's where a couple fusible links separate battery power from the rest of the truck that I have mounted on the core support. Without knowing where your PCM is located/will be located, I don't know what's easiest or cleanest for you. The PCM for your LS has (3) wires which control the fans and the fuel pump - two of them are ground triggers for the fans and the third wire is actually a 12v trigger wire for the fuel pump. I reworked my own LS harness and left these three wires in the main trunk of wires that in factory form (2013 vehicle) routed to the PCM which sat in the engine bay. But when I reworked my LS harness, I wanted the PCM to be in the cab so I tore it all apart and routed the main trunk of wires down the back of the engine, on top of the trans and into the cab under the center console.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#11 |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: 1968 GMC - Ol' Blue
Bed is looking good on there! Wheel wells are huge. I will probably end up with bags and 20's at some point, but that will be after she is done.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#12 |
Registered User
Join Date: Jun 2018
Location: Texas
Posts: 1,353
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Re: 1968 GMC - Ol' Blue
Nice work Potter, cool to see all the work your doing for the replacement parts.
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TA_C10 Stage 1 build - http://67-72chevytrucks.com/vboard/s....php?p=8333444 "It's only money". ![]() |
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#13 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,989
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Re: 1968 GMC - Ol' Blue
mdpotter,
Thanks for the reply. I guess what I am looking for is where the factory harness fan wires are located in the harness? I have the wiring diagrams for the engine, but I am trying to find the physical ends of the wires in the harness to connect the fan wires/relays to.You mention the fuel pump wires? are the wires for the fans in the same loom as the pump? I am expecting to see wire connector(s) for the fans somewhere in the harness all around the engine … IE: the connectors for the AC compressor … I promise I won't high jack your thread anymore. ![]() ![]() thanks!! |
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#14 | |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
Quote:
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#15 |
Registered User
Join Date: Jun 2018
Location: Texas
Posts: 1,353
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Re: 1968 GMC - Ol' Blue
lt1swap.com ?
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TA_C10 Stage 1 build - http://67-72chevytrucks.com/vboard/s....php?p=8333444 "It's only money". ![]() |
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#16 |
Senior Member
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Re: 1968 GMC - Ol' Blue
Yeah, probably some helpful information there too. Unfortunately Brendan doesn't have a lot of info on Gen IV's, but I would think the pinouts he has for 2008 5.3 are similar.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#17 |
Senior Member
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Location: Western Colorado
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Re: 1968 GMC - Ol' Blue
One of the side effects of cutting a LWB down to a SWB is having to re-drill the bumper bracket mounting holes. It was a bit of a struggle though because of my leaf spring hangers, the fuel tank being in the way, and the bed being on but all necessary obstructions. Unfortunately it was nearly impossible to use the forward most hole in the inner bracket because the hole landed about 1/2 on 1/2 off a rivet and was impossible to access with the fuel tank in place so I opted to use the stock rear hole of both brackets and drill another hole a couple inches forward of that. This new hole goes through about 5 layers of steel (frame, leaf hanger, bracket, bracket reinforcement) so it took A LOT of drilling. Not the ideal setup, but this truck won't be going to any demolition derby's and this should hold it okay. We spent the good part of the day working on this.
Then we spent about an hour filling the stake pocket holes for that clean look.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#18 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,989
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Re: 1968 GMC - Ol' Blue
potter,
nice progress! I still really like the blue ![]() ![]() thanks!! ![]() |
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#19 |
Registered User
Join Date: Apr 2014
Location: Azle,Texas
Posts: 2,248
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Re: 1968 GMC - Ol' Blue
Hard work paid off, it looks great as usual.
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Brian 1972 C10, "Loyd", LWB to SWB, 5.3, L83/6L80e, 4:11 Tru Trac, Air Ride, VA, DD, 20" Coys, 4 wheel disc, A quick LS swap turned into a 6 year frame off resto-mod. |
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#20 |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: 1968 GMC - Ol' Blue
I was just looking at the Boyd tank and thinking about bolting the bed down and the bumper on...looks like the tank may have to be dropped to do this on mine.
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1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#21 | |
Senior Member
![]() Join Date: Aug 2018
Location: Western Colorado
Posts: 1,165
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Re: 1968 GMC - Ol' Blue
Quote:
-Non-existence of holes in the frame rails for bumper brackets (LWB to SWB conversion issue) -Locating the fuel filler in the bed wood -Installing the wood strip with the filler in it (this is a pain if you have the Boyd flush mount fill). -Installing the bumper brackets with the tank installed. -Installing the bed wood with the tank installed. Maybe the order for you is bumper, tank, bed, wood? Or bumper, bed, wood, tank? It gets hard to install the hardware to secure the wood to the bed with the tank installed, but if you have enough slack in your fuel lines and wiring maybe you can drop the tank with everything hooked up and reinstall the same way? Either way, you're on the right path with the Boyd tank. I wish I would have spent more money and bought it. If you weld the mounting strips to the frame then it makes tank removal/reinstall a breeze if you have enough slack in your fuel lines and wiring.
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#22 |
Senior Member
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Location: TX
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Re: 1968 GMC - Ol' Blue
I guess I got lucky with the bumper bracket holes on my coil spring rear end 1968, cut the 8 inches off the back. There were already 2 sets of holes on the sides of the frame, ones at the back and another set 8 inches forward. So, when the 8 inches was gone they holes were still there. Had to drill the top of the frame though.
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#23 | |
Senior Member
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Location: Western Colorado
Posts: 1,165
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Re: 1968 GMC - Ol' Blue
Quote:
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1964 Chevy C10 - Gen IV 5.3 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=768632 1968 GMC C15 - Gen III 6.0 Restomod http://67-72chevytrucks.com/vboard/s...d.php?t=772047 1969 Chevy C10 - Restoration http://67-72chevytrucks.com/vboard/s...d.php?t=809184 1978 Chevy Scottsdale K20 1993 Chevy C1500 - 5.3/T56 swapped 2008 Silverado Duramax |
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#24 | |
Almost Satisfied
![]() Join Date: Mar 2002
Location: Springfield, MO
Posts: 2,932
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Re: 1968 GMC - Ol' Blue
Quote:
__________________
1971 C10 Stepside. LSx 6.0 with BTR Stage IV, Speed Engineering Headers, 4L80e transmission w/3200 Circle-D Stall. 3.73. Posi. Purchased this truck when I was 17. I started the rebuild (or take apart) in 1993. I have drug it around all over the country in pieces. Finally back on the road in 2021. "I can't complain, but sometimes I still do. Life's been good to me so far." |
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#25 |
chevy truck fan
Join Date: Mar 2005
Location: Gilbert, arizona 85298
Posts: 1,989
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Re: 1968 GMC - Ol' Blue
Md potter,
thank you for the PM replies, I hope I didn't hijack your thread. As always enjoy the updates from you.. |
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