I'm doing a S197 Aluminum 5.1 Mod motor as we speak, not cheap, I can get you the complete rotation assembly with pistons for about 2000.00 plus shipping, I'm doing all the labor my self, but if U have someone do it for your it's not going to be cheap, expect to spend anywhere from 6000.00 to 8500.00 for labor and Materials, I hope this helps you out