I am in the process of rebuilding my 454 MAGEFI and have a few questions. The engine had a melted piston and I would like to improve the performance while it is apart and being gone through. I have allready purchased a set of Stainless Marine Dry exhaust, K&N Flame Arrestor, and a Crossover kit to remove the waterpump. Should I install Crane Roller Rockers and/or a new cam while the motor is apart? What are my other options? I would like to find a reliable 425-450HP. Thanks for your input.

You will need to be 060 over, roller cam, lifters, intake and exhaust. That should get you close.