i have been thinking about what to do to my 420a, and think maybe i should rebuild my engine with performance parts. but where should i get the parts from and what should i get. i don't really care about cost, but would prefer not to spend an arm and a leg. also what hp increase should i expect and what kind of down time am i looking at. btw i still want to go turbo after the rebuild. thanx
Thats where the engine rebuild kits are. I would say if you plan on boosting, either low compression 8.6:1 or 10.5:1 You could run 12.5:1 with turbo but it will require a LOT more time spent tuning and preventing problems.