Windsor stuff is way easier to buy new, you can run Clevo heads on a windsor like a Boss 302 but you need a special inlet manifold, called a street Boss. There a plenty of aftermarket cranks, rods etc, + heads for Windsors. Stroker kits, with 4340 cranks, H beam rods etc, just depends how strong you want it, and how many cubes. Look to Eagle, or Scat for a rotating assembly, heads AFR are pretty nice. Cheaper heads that need some hand porting etc like World Castings Senoirs or Juniors, in iron are pretty cheap and good an strong. The list is pretty endless for aftermarket stuff for Windsors, as they made millons of them in the US, A 351W will fit in your car ok, but a 302, (stroke it to 331 or 347 for more cubes if needed) will give you more room to plumb up the hair driers. If want an elcheapo you can bang some 351 heads on an early 302/389 and that will drop the compresson some, even more with dished pistons. The roller cam bit is not such an issue, really even in an early block, it's the cam and lifters with are expensive, regarless of the block really. The thing to look for really is a block that hasn't had the crap bored out of it. They don't like getting bored past 030 if you are making power. The later engines have a 50oz external balance as well, so consider this when buying a flywheel and balancer, you have to get the correct weight.
