I have an extra set of LT1 pistons and rods is the reason that I wanted to use them for this project. I'm putting them in a good older 350 block that I am going to send out and have heads refreshed. I'm going to put the thick head gaskets on it because I'm putting a 371 blower w/750 carburetor that I am going to underdrive 30%. I'm not concerned as much about performance as I am about reliability because I'm putting it in an open 1930 Ply roadster to drive and have fun with on sunny days. Thank you for your quick reply on this matter. Any other suggestions?