I get around 4mpg in the city 14 highway. But that may have something to do with how much fun I have

 

who cares about mpg you dont restore an old car and have a toy for MPG you do it for fun and cuz you can afford it

 

I would have to disagree with this, I don't know a single soul on here from a chinaman . What I have seen in the posts I read is 1969SS has been pretty well helpful as well as Gorn and many others, their personas may not be as well takin by some as well as others but, I do see them trying to be as helpful as possible to most of the posts and the answers seem to be very knowledgable in the replies.
by the way, I just got back from west Texas (1000miles), my hwy mleage was 11 mpg , in town, considerably less

 

i suspect your going to get 14-15 highway 8-10 city thats around what i get with my 78 z with a brand new 350 HO from gm. i have straight pipes with flowmasters a shift kit and and really ****ty tires for now.

 

For what is worth I get between 14 and 15 on the highway. I have a gm 350 crate motor, 330 gross hp and 360 gross torque. I have a th350 transmission. .342 posi rearend and 245 50 R16 tires. my engine may have 15000 on it.

 

i get about 20-22mpg on the highway with my stock 305, 2.73 rear end and th350 tranny