Something different Building for MPG.

Ah, here's something I'm planning out too. I'm shooting for a build that is almost exactly the same as dgc333's, but with a little more work done to the heads and a few different parts (but with same compression and basic drivetrain setup). First off instead of the COMP cam, I'm going with a Hughes HEH1928AL (less duration, same or more lift I'm not sure). I'm also going to put a LOT of time and effort into cylinder head porting and combustion chamber edge-radiusing. For the top end I'm going to go with an Edelbrock RPM Air-Gap intake and Thunder Series AVS carb, and an Overdrive 4-speed with the Passon Hemi Overdrive gearset and a 3.55:1 rear. Heck, if dgc333 can get 23 MPG in his slightly-heavier Barracuda with less work than this, then I sure as hell can get 25 in my 3000-lb. '70 Duster with a bit more time and money put into the engine (those tranny gears are going to be a PAIN to save up for though...).