Can you stroke a 5.2 / 5.9 , and keep it EFI ????

Jarlaxle said
Why? You're feeding 13% more engine, so you bump the fuel pressure 13%. That covers you for cold-start and WOT...in closed-loop, the ECM tunes on the fly with the O2 sensors.

mopar ECU's before 1996 don't tune very much unlike GM, you can MP computers that do alot more then factory though