Originally Posted By: efi-diy
Alternative to all the mod's is to swap in an '06 up 4200 - 291HP in full emissions trim - bet 310 HP with a good flowing exhaust.


I agree,much more modern designed engine,is always a good choice.

It's all about the headflow,4 valves per cyl,& two overhead camshafts don't hurt either. ;\)

12 port SDS EFI