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04-03-2021, 09:45 AM
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#1 |
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Special Order
  
Join Date: Nov 2004
Location: Mt Airy, MD
Posts: 85,851
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Cool GMC Pickup With 478 V6
I thought this was worth sharing. Guy did a nice job on this C2500
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"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 ~ |
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04-03-2021, 11:22 AM
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#2 |
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Who Changed This?
 
Join Date: Jan 2013
Location: Simi Valley, CA
Posts: 10,676
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Re: Cool GMC Pickup With 478 V6
Cool truck! Surprising gas mileage due to a tiny carburetor!
 Still pulls like a locomotive, though. Are all the V-6s that noisy under the hood?
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~Steven '70 Chevy 3/4T Longhorn CST 402/400/3.56 Custom Camper Simi Valley, CA |
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04-03-2021, 12:21 PM
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#3 |
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Registered User
Join Date: Aug 2009
Location: Bowser
Posts: 13,731
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Re: Cool GMC Pickup With 478 V6
Likely get 2 mpg more if he hooked the heater hoses up right!
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04-03-2021, 01:18 PM
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#4 |
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Registered User
Join Date: Sep 2011
Location: Ark City, Kansas
Posts: 3,405
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Re: Cool GMC Pickup With 478 V6
The orangesunshine guy must still be asleep...
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04-06-2021, 02:21 AM
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#5 | |
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Senior Member
Join Date: Feb 2002
Location: Tucson, AZ USA
Posts: 7,504
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Re: Cool GMC Pickup With 478 V6
Quote:
Nice 478 V6. YouTube then autoplayed into this Good Ole Boy's V12 GMC Rat Rod on Waylon Wire's Old Iron. 3 of them 702s could run a PT Boat. All one long block, but 4 separate heads. His heads all had the OEM valvecover paint job. Only thing I could think of was, ''Damn. I got a couple pairs of boxer shorts exactly like that!''  But I still like the L25 [292 L6 RPO#].
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Every 25 years I like to rebuild that 292, whether it needs it or not. Last edited by '68OrangeSunshine; 04-09-2021 at 12:28 AM. |
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04-07-2021, 02:19 AM
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#6 |
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Registered User
Join Date: Apr 2016
Location: Dawson Creek, B.C.
Posts: 144
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Re: Cool GMC Pickup With 478 V6
Cool truck and I found out about another engine. Thanks for posting this.
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Nick 1961 Apache short stepside 4X4 SBW 348/4 speed 1960 Apache C-20 long fleet custom cab BBW 283/4 Speed 1967 rust bucket Olds Cutlass with a 455 1972 GMC K-15 350/4 speed long fleet |
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04-07-2021, 07:27 AM
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#7 |
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laying low
Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,514
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Re: Cool GMC Pickup With 478 V6
Just what cubic inch sizes were there during it's run?
I remember looking up when I heard one coming down the street but I never drove one or wanted one. Seems they put those V6s in everything from pkup to school buses and dump trucks. It just seems strange they can supply enough air volume to those torque monsters through one little carb.
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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 |
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04-07-2021, 08:30 AM
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#8 | ||
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Senior Member
Join Date: Jul 2000
Location: North Texas
Posts: 3,597
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Re: Cool GMC Pickup With 478 V6
Quote:
Quote:
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Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! |
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04-07-2021, 12:03 PM
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#9 | |
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Registered User
Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,051
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Re: Cool GMC Pickup With 478 V6
Quote:
http://6066gmcguy.com/gmcv6a.html
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'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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04-09-2021, 05:20 AM
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#10 |
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Registered User
Join Date: Feb 2007
Location: west coast
Posts: 3,396
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Re: Cool GMC Pickup With 478 V6
All about high torque at low rpm and long term durability. Now what if GMC had the 401 V6 option ( in addition to the 396-402 V8 ) in a 3/4-1 ton pickup with the 3.54 ratio?
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