68 GMC 4x4 Pics - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Erl · 09-13-2008, 05:19 PM

Forced inside by Ike, so I decided to try and post some pictures. Added a couple of the GMC 305 V6 since most people are not familiar with them. A lot of folks don't like them, but I do. I had custom pistons made to give me 9:1 compression and installed GMC Magnum heads. The Magnum heads have 2.25 intake and 1.875 exhaust valves for pretty good flow. Desk top dyno says it is around 250 hp with 300ft-lb at 2000rpm. I switched from 4.56 to 3.73 gears with posi front and rear. The new front Dana axle has power disk brakes. I installed a 2.5 inch soft ride lift all around for looks and comfort. Got some buddy buckets redone on the inside, otherwise a plain stock interior.
I am now finishing up a NV4500/NP205 combo to be installed in a few months. Plan to remove the cab for this job, so I will add a Vintage Air conditioning system too. My long term mod is a new engine. I am currently building a 454 V6 from a 478 V6. The 478 uses a big truck crank and flywheel, but a 305 V6 crank will fit and allow using the original flywheel. The cranks have different strokes, so that is where the 454 ci comes from.

killer71 · 09-13-2008, 05:30 PM

Tuff lookn truck!!!

desertrat · 09-13-2008, 06:06 PM

Very nice, I like it!

PanelDeland · 09-13-2008, 06:31 PM

Nice to see a unique engine in one of these.Even though the V-6 was offered most decide to go with a small block.I like my inlne but the V is certainly different.I didn't5 know you could build a 454 from the factory parts though.

BLAZERMAN · 09-13-2008, 06:49 PM

Looks great Erl....yours has always been one of my favorite trucks on the board.

thirdstreettito · 09-13-2008, 07:16 PM

Awesome truck! Great engine!

QKENUF4U · 09-13-2008, 07:23 PM

i dont like step sides at all but that one looks TOUGH !!!! and the engine your building sounds like a wild concoction of parts. lol

**special-K** · 09-13-2008, 07:56 PM

What a nice truck.Everything is just right.

1969stepside · 09-13-2008, 08:07 PM

that is to cool i love it

468BIGBLOCK · 09-13-2008, 08:23 PM

on you tube there is a v12 gmc engine like this v6, i dont know if is factory or custom built using 2 of the v6 engines. it is a neat video!!

msgross · 09-13-2008, 08:37 PM

nice truck... probably what mine look like when newer (fleetside though). Any pics of the inside and those tow hooks? I need to know which way they are supposed to twist...

**Boog** · 09-13-2008, 08:46 PM

Now you know the guy down at the gas staion or the parts store ain't gonna believe that he's looking at a 454 V6. You'll leave em scratchin their heads...

arkracing · 09-13-2008, 08:51 PM

Nice Truck. How about some specs on those tires? - They look nice and aggressive.

justcuz · 09-13-2008, 11:13 PM

Quote:

Originally Posted by msgross

nice truck... probably what mine look like when newer (fleetside though). Any pics of the inside and those tow hooks? I need to know which way they are supposed to twist...

They twist to the inside of the frame rails with the opening in the hook to the back of the truck from the factory.

What distributor did you use to get the HEI?

Nice looking truck, the mods are geat and it will still look stock. With the torque you develope the 3.73 change was a good idea.

How much shorter is the 454 stroke from 478? Off the top of my head it seems like maybe 1/4".
What rods and pistons will you use?

1969stepside · 09-13-2008, 08:56 PM

post that you tube video

tcb-1 · 09-13-2008, 09:22 PM

that truck just looks right. beeeeeuatiful. period.

Husker · 09-13-2008, 09:40 PM

Nice truck Great setup.
Ron

Jtrux · 09-13-2008, 11:03 PM

That is a kick ass truck.

72BlckButy · 09-13-2008, 11:16 PM

That is a great looking original truck!

Nice work, and I personally love the 305!

sdkid · 09-13-2008, 11:20 PM

You should top off the engine with a set of the plaid valve covers, just to get more second looks.

Critter · 09-13-2008, 11:32 PM

NICE! I like the GMC V6s. I can't even imagine how cool the 454 V6 will be.

cruiserman · 09-13-2008, 11:54 PM

Very nice. I'm not a step side fan, but that one looks great.

**Yukon Jack** · 09-14-2008, 08:19 AM

That is a favorite truck of mine!

BobS · 09-14-2008, 10:03 AM

Great looking truck, Erl! The V6/NV-4500 combo sounds interesting. You used 427 pistons for the 9.0:1 compression in the 305, right?

Bob

67_C-30 · 09-14-2008, 10:11 AM

OH MAN I LOVE THAT TRUCK!!! I've got a 401 block and set of 351 Magnum heads that I'm dying to put in the something! My hat goes off to you going down the road less traveled with the V6!

09-13-2008, 05:19 PM	#1
Erl Registered User Join Date: Mar 2002 Location: Dallas, TX Posts: 555	68 GMC 4x4 Pics Forced inside by Ike, so I decided to try and post some pictures. Added a couple of the GMC 305 V6 since most people are not familiar with them. A lot of folks don't like them, but I do. I had custom pistons made to give me 9:1 compression and installed GMC Magnum heads. The Magnum heads have 2.25 intake and 1.875 exhaust valves for pretty good flow. Desk top dyno says it is around 250 hp with 300ft-lb at 2000rpm. I switched from 4.56 to 3.73 gears with posi front and rear. The new front Dana axle has power disk brakes. I installed a 2.5 inch soft ride lift all around for looks and comfort. Got some buddy buckets redone on the inside, otherwise a plain stock interior. I am now finishing up a NV4500/NP205 combo to be installed in a few months. Plan to remove the cab for this job, so I will add a Vintage Air conditioning system too. My long term mod is a new engine. I am currently building a 454 V6 from a 478 V6. The 478 uses a big truck crank and flywheel, but a 305 V6 crank will fit and allow using the original flywheel. The cranks have different strokes, so that is where the 454 ci comes from. Attached Images __________________ 1968 GMC 305 V6 3/4 4x4 Stepside 06 Corvette Daily Driver Dallas TX

09-13-2008, 05:30 PM	#2
killer71 Registered User Join Date: May 2006 Location: at work Posts: 2,552	Re: 68 GMC 4x4 Pics Tuff lookn truck!!! __________________ R.I.P. Killer 71 10/26/07

09-13-2008, 06:06 PM	#3
desertrat Registered User Join Date: Nov 2006 Location: Pahrump, NV Posts: 1,079	Re: 68 GMC 4x4 Pics Very nice, I like it!

09-13-2008, 06:31 PM	#4
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: 68 GMC 4x4 Pics Nice to see a unique engine in one of these.Even though the V-6 was offered most decide to go with a small block.I like my inlne but the V is certainly different.I didn't5 know you could build a 454 from the factory parts though. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"

09-13-2008, 06:49 PM	#5
BLAZERMAN Currently Blazerless Join Date: Apr 2000 Location: St. Joseph Mo. Posts: 4,828	Re: 68 GMC 4x4 Pics Looks great Erl....yours has always been one of my favorite trucks on the board. __________________ 1972 C/30 133" W.B. C&C 1970 GMC 3500 157" W.B. single wheel C&C

09-13-2008, 07:16 PM	#6
thirdstreettito Resident of Here Join Date: May 2008 Location: Wesley Chapel, FL, USA Posts: 7,716	Re: 68 GMC 4x4 Pics Awesome truck! Great engine! __________________ ~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck

09-13-2008, 07:23 PM	#7
QKENUF4U Senior Member Join Date: Jan 2005 Location: SUNNY WARM BIKE RIDING COTTONWOOD ARIZONA Posts: 2,097	Re: 68 GMC 4x4 Pics i dont like step sides at all but that one looks TOUGH !!!! and the engine your building sounds like a wild concoction of parts. lol

09-13-2008, 07:56 PM	#8
special-K Special Order Join Date: Nov 2004 Location: Mt Airy, MD Posts: 85,852	Re: 68 GMC 4x4 Pics What a nice truck.Everything is just right. __________________ "BUILDING A BETTER WAY TO SERVE THE USA"......67/72......"The New Breed" GMC '67 C1500 Wideside Super Custom SWB: 327/M22/3.42 posi.........."The '67" (project) GMC '72 K2500 Wideside Sierra Custom Camper: 350/TH350/4.10 Power-Lok..."The '72" (rolling) Tim "Don't call me a redneck. I'm a rough cut country gentleman" R.I.P. ~ East Side Low Life ~ El Jay ~ 72BLUZ ~ Fasteddie69 ~ Ron586 ~ 67ChevyRedneck ~ Grumpy Old Man ~

09-13-2008, 08:07 PM	#9
1969stepside Registered User Join Date: Feb 2008 Location: Johnson City Tennessee Posts: 1,191	Re: 68 GMC 4x4 Pics that is to cool i love it __________________ Greater love hath no man than to lay down his life for a friend. Members i Have met Earl Slick68 1969 Stepside Build thread http://67-72chevytrucks.com/vboard/s...=1#post4253546 Chevy Trucks the longest lasting most dependable trucks on the road

09-13-2008, 08:23 PM	#10
468BIGBLOCK MEMBER OF THE JUNK MAN CLUB Join Date: Jul 2001 Location: paragould arkansas 72450 Posts: 425	Re: 68 GMC 4x4 Pics on you tube there is a v12 gmc engine like this v6, i dont know if is factory or custom built using 2 of the v6 engines. it is a neat video!! __________________ I LIKE 67-72 CHEVYS, I HAVE OWNED OVER 150 OF THEM IN THE LAST 25 YEARS..

09-13-2008, 08:37 PM	#11
msgross Registered User Join Date: Jul 2006 Location: Central PA Posts: 12,201	Re: 68 GMC 4x4 Pics nice truck... probably what mine look like when newer (fleetside though). Any pics of the inside and those tow hooks? I need to know which way they are supposed to twist... __________________ The Garage: 1968 K-10 SWB - "Project Money Pit" 1996 Z-71 - "huntin rig" 1969 C-10 LWB (SOLD) "Project flip that truck or else" 1993 Passport, F@rd 1-ton (SOLD)"Project Cousin Eddie" My Garage Build "The 1,000 footer"

09-13-2008, 08:46 PM	#12
Boog laying low Join Date: Mar 2001 Location: Searcy, Ark. USA Posts: 13,457	Re: 68 GMC 4x4 Pics Now you know the guy down at the gas staion or the parts store ain't gonna believe that he's looking at a 454 V6. You'll leave em scratchin their heads... __________________ Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross

09-13-2008, 08:51 PM	#13
arkracing Weekend Warrior Join Date: Oct 2004 Location: CT Posts: 1,787	Re: 68 GMC 4x4 Pics Nice Truck. How about some specs on those tires? - They look nice and aggressive. __________________ -'07 GMC Sierra K2500HD -'66 C10 Suburban -'68/'71 K20 Service Bed Project -'69 Chevy C30 Mason Dump -'33Ford P/U 396ChevyPowered

09-13-2008, 08:56 PM	#15
1969stepside Registered User Join Date: Feb 2008 Location: Johnson City Tennessee Posts: 1,191	Re: 68 GMC 4x4 Pics post that you tube video __________________ Greater love hath no man than to lay down his life for a friend. Members i Have met Earl Slick68 1969 Stepside Build thread http://67-72chevytrucks.com/vboard/s...=1#post4253546 Chevy Trucks the longest lasting most dependable trucks on the road

09-13-2008, 09:22 PM	#16
tcb-1 Nothing to see here..... Join Date: Jun 2007 Location: Shawnee, KS Posts: 4,625	Re: 68 GMC 4x4 Pics that truck just looks right. beeeeeuatiful. period. __________________ Doug THANK YOU to our American Soldiers & Veterans - POW MIA "You will NEVER be forgotten". The democracy will cease to exist when you take away from those who are willing to work and give to those who would not. Thomas Jefferson



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09-13-2008, 09:40 PM	#17
Husker Registered User Join Date: Dec 1999 Location: Mid NE USA Posts: 2,212	Re: 68 GMC 4x4 Pics Nice truck Great setup. Ron __________________ Member #111 68 C-10 Daily Driver 70 4x4 Project 76 Jeep CJ-5 Help Support the Board: http://67-72chevytrucks.com/vboard/payments.php He who knows nothing is closer to the truth than he whose mind is filled with falsehoods and errors. Thomas Jefferson

09-13-2008, 11:03 PM	#18
Jtrux I'm a poor spectator Join Date: Aug 2006 Location: San Antonio, Tx Posts: 2,287	Re: 68 GMC 4x4 Pics That is a kick ass truck. __________________ 2006 Jeep Unlimited IMPACT ORANGE 1993 Chevy 2500 4x4 ExCab LWB 454/NV4500 Tow rig 1977 Ford F100 2x4 LWB 1st truck I owned, still have it!!! 1979 Ford F150 4x4 SWB Built Ford Tough!!! 1971 Chevy Blazer 350 / SM465 / NP205 UNDER CONSTRUCTION Soon to have a LQ4 6.0!!!

09-13-2008, 11:16 PM	#19
72BlckButy Tot Roddin' Join Date: Apr 2005 Location: Mid-MO Posts: 24,461	Re: 68 GMC 4x4 Pics That is a great looking original truck! Nice work, and I personally love the 305! __________________ -Nate 1969 CST SWB - Project Blank Slate (4.5/6" ECE Static Drop, 6-lug disc brake upgrade (manual), Billet Specialties Vintec 20x8.5 255/40 (F) 20x10 295/40 (R), 250 I-6) 1960 AMF Skylark - Tot Roddin' (Lowered with custom frame; soon to include custom push bar and interior) 2008 Silverado CrewCab 1LT (5.3L, 3:73, 4x4, LT1, Z-71, Towing Package)

09-13-2008, 11:20 PM	#20
sdkid Registered User Join Date: Sep 2004 Location: Pierre SD Posts: 1,533	Re: 68 GMC 4x4 Pics You should top off the engine with a set of the plaid valve covers, just to get more second looks. __________________ I think the world needs a drink... Help somebody...If you can....VanZant We're not wrong, we're not sorry, and its probably gonna happen again. That's the truth about men. Tracy Byrd Member# 13924 '70 c10, 350/350 '68 c10 250/4spd '68 c10 no eng/trans fac ps/pb/ac/at (future father/sons project) '48 Chevy Loadmaster

09-13-2008, 11:32 PM	#21
Critter Future TOTM Winner Join Date: Aug 2006 Location: Bulverde, TX Posts: 2,692	Re: 68 GMC 4x4 Pics NICE! I like the GMC V6s. I can't even imagine how cool the 454 V6 will be. __________________ 72 Chevy CST K5 HIGHLANDER BLAZER Getting a 6.0,NV4500,NP205,14BFF (Currently laying all over the place in little pieces) 72 Chevy swb step-side "LS" 6.0 Here's a build thread of sorts 2002 HD2500 Crew Cab, 8.1L Allison 4x4 Daily Driver Check it out www.lsdyno.com

09-13-2008, 11:54 PM	#22
cruiserman Registered User Join Date: Dec 2006 Location: Idaho Posts: 210	Re: 68 GMC 4x4 Pics Very nice. I'm not a step side fan, but that one looks great. __________________ 72 C2500 LWB 402 Sierra Grande 05 Odyssey 08 Tundra

09-14-2008, 08:19 AM	#23
Yukon Jack Post Whore Join Date: Feb 2000 Location: Rose Hill, KS, USA Posts: 12,684	Re: 68 GMC 4x4 Pics That is a favorite truck of mine! __________________ 1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14

09-14-2008, 10:03 AM	#24
BobS Senior Member Join Date: May 2001 Location: West Central Minnesota Posts: 568	Re: 68 GMC 4x4 Pics Great looking truck, Erl! The V6/NV-4500 combo sounds interesting. You used 427 pistons for the 9.0:1 compression in the 305, right? Bob __________________ V-6....only GMC Trucks have it! 62 GMC W5000 NAPCO-V6 65 GMC 2500 NAPCO Panel-V6 66 GMC 1000-V6 66 GMC 1500-V6 67 GMC K1500-SBC (originally a KM-V6) 68 GMC C1500-V6 68 GMC C1500-V6 68 GMC Suburban C2500 70 Chevy K20-SBC 71 Chevy C30 Longhorn-SBC 72 GMC Suburban C1500-BBC 72 Chevy C10-SBC 72 GMC C5500-ToroFlow Diesel

09-14-2008, 10:11 AM	#25
67_C-30 I have a radical idea! Join Date: Jan 2005 Location: Sweet Home Alabama! Posts: 6,513	Re: 68 GMC 4x4 Pics OH MAN I LOVE THAT TRUCK!!! I've got a 401 block and set of 351 Magnum heads that I'm dying to put in the something! My hat goes off to you going down the road less traveled with the V6! __________________ '67 C-30 Dually Pickup 6.2 Turbo Diesel, NP435 ‘72 C-10 SWB , 350 4bbl, TH350 '69 C-10 SWB , 250 L6, 3 OTT '69 GMC C3500, dump truck, 351 V6, NP435 '84 M1009 CUCV Military Blazer 67 C-30 Turbodiesel build thread http://67-72chevytrucks.com/vboard/s...d.php?t=254096 My trucks http://s226.photobucket.com/albums/d...ediafilter=all Member of the 1-Ton Club! Last edited by 67_C-30; 09-14-2008 at 10:15 AM.

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