As I've said in the past good luck with that.
I've seen The Little Oven. that the rods are heated in and then the rod is put in the piston an the pin is stuck in and and then when it cools everything is nice and tight.
what I'm interested in is knowing how you are going to get the pin back out.
The old piston doesn't matter if it gets damaged I have already tested it and I can get them out pretty easily with a ball joint press iv already removed 4 of the 8 they came out fairly quickly.