Well I have searched for 2 days and have not found any info on hopping up the 4.6 modular engine. Other than headers, injectors, mass, and such.. I want to find out about internal options of pistons and cams. Does any one have any leads or done any mods to thier 4.6? Even a shop, So far the ones I've talked to have evaded this series of engines. I would like to shoot for over 350hp. Any ideas would be great. Thanks.