I have a 302 EFI that was dynoed at 305 rwhp. Most cars on the street can not keep up with it. But I'm installing a 354 ci stroker kit. I hope to get 360 - 370 rwhp. Like they say, once you get use to the power, you want more. If you have the money go with a stroked 428/461 KC 600 hp motor. That should keep you happy for a long time.
I like a small block and will stay with it in this Cobra, but the next Cobra ---BB