I have the 500 carb on mine , it's cold nature but runs really good after it's warmed up.The GMC V6 is a low rpm engine , a lot of low end torque. I don't drive much over 50mph. I put the 63 factory plaid valve covers and a 67 air cleaner.
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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!