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Re: 1964 GMC 1500 "crustine" semi- build.
Hate to see the V6 go but it happens.
You could just adapt the nv4500 behind the V6 and swap out the rear to 3:54, that would definitely help with fuel millage and highway speed but unfortunately it would not have the get up and go of the 454.
The last 454 I had in a truck only got 10mpg, it did not matter if it was going up a mountain or going down, towing or just coasting.
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James
63 GMC V6 4speed carryall
65 chevy swb bbw V8 auto
68 K20 327/4 speed, buddy buckets
2002 GMC CC Dually Duramax
64 GMC lwb 3/4 V6 4speed SOLD
66 GMC swb bbw buddy buckets SOLD
IG duallyjams
The only thing that stays the same is constant change!
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