i say the 5.0 just dont go overboard cuz they do go through performance parts pretty quickly...do it right the first time and even then have spare parts if its going to be more track oriented. My fiancee's uncle has a orange 5.0 and he has gone through 2 engines. But hey he doesnt care he made 9 second passes all motor without nitrous.

so high hp is nice in 5.0s since the parts are hella cheap.