Join Date: Nov 2004
Feedback Score: 0 reviews
Re: Saw an interesting truck last weekend - 1967 GMC
i belong to an email group that is crazy about those old v6 gassers. the 702 V-12 was called the "twin six". there's a good reason for this. GMC took the 351 V6, and cast a 12 cyl block and crank off it. This engine used 4 cyl heads, identical to the 351 heads, 2 351 intake manifolds, and two distributors. they got 2 MPG at the best of times, less when loaded. very interesting engines. these guys swear by those old v-6's. I've had a few of them over the years, and found them to be gutless piles of crap. very heavy duty though, they last forever and pull pretty good. just don't plan on leaving a stop light with any amount of speed. although one guy did put a 478 v-6 in his 1967 GMC pick up, and supposedly, it's quite a hot rod. the engine referred to the initial post was a 6-71. it's likely it was a crackerbox, B model, or an L model. all were available with this engine. the B model is really the coolest. I had one of those. they have gull wing hoods, and conventional pick up truck cabs. This was the predecesor to the GMC topkick, as the body sat about 4 inches above the frame.
really big crew cab dually on a 1985 GMC Topkick chassis with Cat 3208, Allison auto trans, and airbrakes. 1955 GMC Scenicruiser bus, 8v-71, Allison 6 speed auto. 1966 GMC 4107 bus, 8v-71, 4 speed spicer/grinder.