my 1971 cheyenne/20 gets about 8mpg in the city and about 10 mpg on the highway if i drive the speed limit but i usally dont. I have got a rebuilt 350 with the original thm350 tranny and for a 3/4 ton truck i have had it clocked at 145 mph as the guy that owned it before me was going to convert it to a 1/2 ton street/strip truck the truck look pretty crummy cause i just wrecked it and being in high school and working fast food gives me far less money supply than most of you guys to rebuild the truck and the picture was taken 2 days before the wreck so you cant see the after math
