400hp 318

Porting is more than just removing metal. Everyone can do it, but only some can do it right, and only some of those can do it WELL. 302s are the better cheap way out heads for the street. If this is a serious trip effort car, then the 360 heads are the better choice. The 360 heads will move more air, but you may not want that, and there are downsides to just bolting them on.