Stock bottom end 360 magnum

Everyone here is pretty much dead on with their advice. My two cents, while the pan is off, check the rod and main bearings. The odds are good that the mains are perfect. The odds are good that the LOWER rod shells are good. Be sure to slide a rod up into the cylinder and check the UPPER shells as well. If that has had a bad plenum gasket, I'll bet you a nickel that there has been enough detonation to show just a little bit of copper in the center of the upper shell.