Let me start by saying I know nothing about mod motors (I'm a 5.0 guy) so that's why I came here to you guys. I have a subcontractor at my work who has made some pretty tall claims about a 2001 4.6 that he built. He claims to have added nothing but a stroker kit and a Kenne Bell supercharger to his otherwise stock '01 2V 4.6 and gotten 620 rwhp. This seems a bit high to me but I don't know. At what hp point does the stock block come apart? This fellow claims to be a circle track motor builder on the side yet didn't know how to port a set of E7 5.0 heads for another coworker. He won't bring the car to work and always seems to forget the dyno sheet. Still for all I know he could be telling the truth. Any ideas?