360, LA360, or Magnum 360?

Basically the bottom ends are the same, but the magnums have a lighter piston I think, plus they have thinner rings, reduces drag a little. The stock shortblock would be mostly the same as far as rpm goes, but the valvetrain would be the limiting factor. I think stock magnum would be ok to 5800 or so.. But with good springs, cam, rockers ect, the sky is the limit.