i've read about a non pi short block with ported pi heads and upgraded cams (sorry can't remember which ones) put down 400 at the flywheel. really not bad for a 4.6 2V. i like the 4.6 motors, smooth running. they don't respond till about 4000 rpm in stock form tho. i don't mind those cars at all. i like them. easy to find and cheaper then a notched fox for sure.