Armond. it's the compression that makes for milage. A lot of guys who had 8 to 1 283's could not understand why the 10 to 1 327's always got higher milage on the road. I'm sure you don't have 7-1 any more...JD
216.158 MPH 12-Port 302 GMC on 70% 171.0 MPH 302 stock head on gasoline 7 years later
