Originally Posted by sseidriver97
back in stock form i could pull 19 if iset the cruise at 70 and didnt have to touch it for the entire trip
(BUbba and i used to make 220 mile one way runs up north but if i went to 75 i only got 18.
just out of curiosity you still have the tbi on the 383 or did you put a carb on there?
my old truck was a tbi 350/5spd 2wd and i could get 22 hwy, i had a bed cover, cat "delete", and some other stuff.
now i get 15 or less with this vortec, its hauling alot more weight i guess though.