Starting a rebuild of a 78 440 out of a D100.

With optimum miles per gallon using regular gas as the end goal, what would be the best compression ratio to go with? Block is bored .030.

Thanks for your inputs!

452 heads, pocket ported.

Planning on using a Cam = Int .458 / Exh .470 --- 208 at .050

I was leaning toward 9.5:1 compression

Engine will be going in my 84 D350 Crew Cab Dually. I average 150 to 200 miles per week.

In about a year, I intend on adding a MSD Atomic EFI Throttle Body (2900) and an overdrive automatic trans.

Last edited by WyleECoyote; 07/22/15 06:26 PM.
Wile E. Coyote
Super Genius, Lover of FCA US LLC Products
*************
68 Road Runner (440 4-spd), 71 Superbee (383 slap), 71 Charger 500 (383 4-spd wA/C 1of 182), 72 Imperial, 74 Charger SE (440 sunroof), 84 D350 Crew-cab Dually (440), 75 D300 Dually Tandem (318 4-speed)