i know a 350 is a bit differn't than a 235 but my 78 suburban has a 2 bolt 350 with 4 barrel and its got 4.11s it could run the interstate (70 mph) all day at 3 grand just use a bit more oil that way but i have to say i'm impressed with my old beast got bout 11.5 to the gallon but what do you expect? normally i only get 9
Nate
