I just put mine through a 200 mile trip this weekend up to B/E&A for the get together. my 438 (383 .060 over, with a 440 crank...all BUT a 440!) with a .525 lift cam, edelbrock RPM heads, 750 holley HP, and dyno'd at 535 tq @ 3600 rpm and 505 hp @ 5800 rpm...got 10 mpg on the trip.

and that's in a 4200 lbs truck with the aerodynamics of a brick...sideways!

gears are a TKO-600 with .64OD, rear axle is a 4.56 ratio and 29" tires...I was turning 2650 RPM at 75mph. it'll do the speed limit at 2400 RPM

**Photobucket sucks**