I agree with Ron. If you really want 500hp, a stroked 351W is the way to go. A 408W will get to 500hp/500ft/lbs without having to spin it over 6000 rpm. To get 500 hp out of a 347, your going to have to build a high rev motor. Stroker + high rev = boom.
If your wanting a Scat stroker kit, a great place to get it is Brian Adams (
scatstroker@hotmail.com) at
AD Performance.
Pete