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Old 07-18-2014, 02:49 PM   #1
vannatta20
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Re: 1968 C10 5.3 swap, the easy way.

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ahhh.......cam is stock then. That would be a limiting factor. That said...your dyno numbers are good. Wouldn't think you'd be getting valve float with those springs in the low 5000rpm range but I'm not familiar with their specs.

put a .550 to .600 lift cam in it with duration in 210-220/220-230@.050 range...along with a nice set of .650 lift dual springs and some c-moly p-rods to keep it together and watch it wake up!
I did exactly this and 68GMCCustom is exactly right! Has so much more power and driveability is still great.
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Old 11-06-2013, 09:27 AM   #2
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Re: 1968 C10 5.3 swap, the easy way.

Yep, a TSP sleeper 220 cam with dual springs and hardenend pushrods will wake that baby up to about 380 hp.
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Old 11-26-2013, 05:27 PM   #3
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Re: 1968 C10 5.3 swap, the easy way.

Very nice truck!

Where did you get the LED gear indicator?
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Old 11-26-2013, 09:17 PM   #4
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Re: 1968 C10 5.3 swap, the easy way.

I bought a LED at radio shack and rigged a mount for it.
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Old 11-26-2013, 09:27 PM   #5
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Re: 1968 C10 5.3 swap, the easy way.

Just soldered to the factory wire?
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Old 11-26-2013, 09:53 PM   #6
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Re: 1968 C10 5.3 swap, the easy way.

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Just soldered to the factory wire?
I just ran it to ignition hot wires behind the dash.
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Old 11-26-2013, 09:56 PM   #7
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Re: 1968 C10 5.3 swap, the easy way.

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I just ran it to ignition hot wires behind the dash.
Gives it a nice little touch. I like it.
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Old 11-26-2013, 09:27 PM   #8
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Re: 1968 C10 5.3 swap, the easy way.

Gas mileage update! The 6.0 is getting MUCH worse gas mileage than the 5.3. I didnt think it would be a big difference but it sure is. getting like 14mpg . Its been tuned by two of the top tuners in the US as well. I baby it as well. I wish i never put it in. My 5.3 got at least 18 in town. Also I thought i would notice the torque increase around driving around town but its not that huge of a increase.

Update. The factory 6.0 needs a bigger cam in it. I did this and I enjoy the 6.0 now.

Last edited by vannatta20; 07-18-2014 at 02:50 PM.
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Old 04-15-2014, 11:47 PM   #9
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Re: 1968 C10 5.3 swap, the easy way.

thats rad
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Old 04-16-2014, 07:30 AM   #10
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Re: 1968 C10 5.3 swap, the easy way.

Looks pretty frisky when you got the chance to put your foot in it and was pretty flat through the twists. Bet it was fun. Nice job.
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Old 04-16-2014, 07:58 PM   #11
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Re: 1968 C10 5.3 swap, the easy way.

Thanks! For suspension I just have a large sway bar in front with airlift bags inside all 4 coil springs. I was shocked it handle so nice. I was just worried something would break if I pushed it hard. It also has a new cam in it which gave it so much more power.
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Old 04-28-2014, 12:52 PM   #12
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Re: 1968 C10 5.3 swap, the easy way.

Subscribed!
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Old 05-21-2014, 02:16 AM   #13
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Re: 1968 C10 5.3 swap, the easy way.

I just noticed you're in Vegas... You should come by the weekly car show/meet on Sundays. There are a couple 67/72 trucks that show up, one is a member here and has an LS1 swap.
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Old 05-23-2014, 06:08 PM   #14
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Re: 1968 C10 5.3 swap, the easy way.

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I just noticed you're in Vegas... You should come by the weekly car show/meet on Sundays. There are a couple 67/72 trucks that show up, one is a member here and has an LS1 swap.
Car show on Sundays? I only knew about cars and coffee on Sundays. Can you pm me your#?
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Old 06-06-2014, 04:43 PM   #15
chevy72blu
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Re: 1968 C10 5.3 swap, the easy way.

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I just noticed you're in Vegas... You should come by the weekly car show/meet on Sundays. There are a couple 67/72 trucks that show up, one is a member here and has an LS1 swap.
x2! I'd love to see this truck in person
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Old 05-26-2014, 04:26 PM   #16
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Re: 1968 C10 5.3 swap, the easy way.

That's weird that you're getting such bad mileage with the LQ4. My LQ4 Chevelle with 315 tires, gm hot cam, t56 and 3.90 gears gets 23mpg on the highway/ ~17 in town. I know it's a car and it's lower, but those wide tires don't do me any favors. No AC though.

Nice truck man. Im planning out my 71 GMC for my newly acquired 5.3/auto swap and I really like the way you did the mounts and AC.
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Old 05-26-2014, 05:41 PM   #17
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Re: 1968 C10 5.3 swap, the easy way.

My 68 firebird with 4.10's, t56 and the 6.0 in that got 24 on the highway. These trucks are not aerodynamic in any way. My firebird would cruise at 90mph no problem. My truck needs a lot more gas input to maintain the higher speeds. I changed cams in the truck and got 17mpg on my last trip though.
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Old 06-11-2014, 07:54 PM   #18
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Re: 1968 C10 5.3 swap, the easy way.

You said you ran dirty dingo engine mounts. Did you just use a dingo 1973+ mount on the driver side with the clam shell isolator and a different one on the passenger side? Did you have to get 2 sets of plates to do this? Curious since I cant really make it out in the pictures. Thanks.
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Old 06-22-2014, 10:33 PM   #19
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Re: 1968 C10 5.3 swap, the easy way.

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You said you ran dirty dingo engine mounts. Did you just use a dingo 1973+ mount on the driver side with the clam shell isolator and a different one on the passenger side? Did you have to get 2 sets of plates to do this? Curious since I cant really make it out in the pictures. Thanks.
i used dingo plates on both sides. that pic was to show how the 73 mount is different.
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Old 06-22-2014, 09:18 PM   #20
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Re: 1968 C10 5.3 swap, the easy way.

love the swap
post pics of your car when you get time
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Old 07-06-2014, 05:28 PM   #21
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Re: 1968 C10 5.3 swap, the easy way.

Came out real nice bro thanks for all the info
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Old 07-09-2014, 07:37 PM   #22
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Re: 1968 C10 5.3 swap, the easy way.

Very cool! I plan on doing the same swap very soon the same way. Nice work!
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Old 07-15-2014, 01:07 PM   #23
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Re: 1968 C10 5.3 swap, the easy way.

my inspiration thread! the 350 i just put in my 69 a few months ago is starting to smoke at warm idle now...time to find a 5.3 and do a mild build but i plan on keeping it hooked up to my th400 unless i score a trans cheap as well. so dingo mounts and 73+ mounts and im guessin the factory driveshaft will work as long as the mounts are adjusted accordingly. lookin into the car intake and manifolds since im dropped 3" but plan to lay frame in the near future. *thumbs up*
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Old 07-18-2014, 08:00 AM   #24
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Re: 1968 C10 5.3 swap, the easy way.

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my inspiration thread! the 350 i just put in my 69 a few months ago is starting to smoke at warm idle now...time to find a 5.3 and do a mild build but i plan on keeping it hooked up to my th400 unless i score a trans cheap as well. so dingo mounts and 73+ mounts and im guessin the factory driveshaft will work as long as the mounts are adjusted accordingly. lookin into the car intake and manifolds since im dropped 3" but plan to lay frame in the near future. *thumbs up*
I would go ahead and find a 5.3/4L60E combo and change them both.
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Old 07-20-2014, 03:44 PM   #25
68GMCCustom
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Re: 1968 C10 5.3 swap, the easy way.

Thanks....glad to here I'm not putting bad information out there!
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