I got my 292 engine today from the machine shop YEAH!!!!!! and it has propane pistons, balanced and a ported and polished head. It was bored .040 over. The compression is about 8.7:1 instead of the stock 8.0:1. The simtest that spins the engine with hot oil for 25 minutes without actually running it has 4 cylinders at 180 psi. And the other 2 at 170 or just above. Anyhow what would be the best carb for mpg and reasonable power? Two single is what I was going to run but its hard to find good rebuildable ones that will run together well. Should I still go that way or should I use a 4 bbl and if so, Holley or Edelbrock? Would a 390 be enough or a 450/500 would be better? I don't want to over carb like before on my 250. It had a 600. Would like some good ole' stovebolt opinions. Yeah!!! I'm a stovebolter. Just keeping things "inline".