Were can i find dome pistons for 400 b-block engine ? Mopar Perfomance P3690831 are out of stock......
What compression are you shooting for? Drag car or street/strip?
This is only my opinion but I've always liked a flat top piston at zero deck or real close to it. I think it promotes good flame travel and if set up right with quench it can really make nice power and still use pump gas on the street, and maybe mix in 50% race gas at the track or just one gallon of race gas like I did.
I had 2 different big block street cars that ran high 9's with flat tops and it seemed like a lot of guys that were running slower had dome pistons. This is just my opinion, and I'm sure there's plenty of big dome high compression cars that fly but a lot of them I saw kinda seemed like a waste of race gas money.