Looking for advise on 454 Mag EFI builds. Would like to upgrade to a roller cam, heads, valves and exhaust. Plan to stay away from silent choice to help prevent reversion. What do you guys recommend and who would you recommend for the tune?

Would like to get to 500 HP.

Would consider ditching the EFI and going with a blower and carb setup as an option with mild boost. Maybe something similar to the 525SC.

motors are new - zero hours and have been fogged 2 times per year and stored in climate controlled building. Valve springs would be shot, but looking to either upgrade the current heads with either port and polish work along with new valves and hardware or go with aluminum heads. They may see some low hour salt water use now and then.

Looking to do it yourself or have it done for you?

If the latter, look up Saris Racing. They just posted the other day on upgrade packages they're offering. Great people and they do great work. They just put together upgrade packages for those exact motors.