to get the rods off you need to press them off with a rod press heat will not do . to put the new pistons back on the rods. the rods should be heated in a rod oven to hang the new pistons. have them check to make sure they are not bent or twisted. if you float them the rods will need to be bored out. this can be done on a mill with a boring head and then bushed and brunished in. this can be done two ways with a sunnen bushing expander or ball broach just press them in will not do. they need to be expanded in every valley of the rod bore for 100% heat transfer and this locks the bushing in the rod and keeps the bushing of getting beat out . then they need to be honed out to.0005 -.0007 they will need oil so you will have to drill a small hole on top of the rod with a chamfer on the oil hole . the hole should be done after expanded of the rod bushing. they are made from tuff bronze to drill the bushing you will need cobalt or solid carbide to drill the bushing this is alot of work. on the locks there are many ways to lock the pin. buttoms. tru-arcs double spiroloxs round wire locks. but if the pistons are not cut for locks they can be but this is a lot of work and like said you will not need it