how much horse power does a 390 have?
 

i have a 390 w/ straight header and a holley four bbl, i was just wondering how much horsepower it has or an approximate guess. and if u have a clue on gas mileage.(manual tranny).

prolly around 275hp and about 10mpg average.

Ya I agree with fordman....sounds about right, but I'll go about 12mpg...cause I get 10 with my C6...

Russ

thanks for your help

how much torque does it make?

I think stock there around 376 @ 2600rpm.....

Russ