360 magnum. 1 piston lower in cylinder??

Just weigh the big and small end of the rod, because you need to match those weights with the new one by grinding some off each end.maybe.

Cold it will press out fine, use the right arbor/or smaller pin. When you press the new piston... You'll want to put the pin in the freezer and heat the small end of the rod before pressing the new pin through the piston and into the new rod.

Rod heater would be nice.