I know a lot has been said on this site about keeping our birds Poncho, but as a builder out here told me, It's your car, make it the way you want it. Personally, I am putting too much time and green into restoring my car, so I want a nice powerplant, but I certainly am not going to be dragging on the streets like I did when I was a kid, so about 425 HP will be enough for me. Good luck with your builds.