Im going with a stock 302 for now. I got 4 stock 302's sitting, so Im going to try to blow them up before I do anything better... But I do plan to do the R block and a 331 stroker in the distant future... For now i was just going to use the 70mm and a little spray... Did you change anything to the kits since the one I have??? Any upgrades to tubing or anything??? I may want to upgrade if you have some better stuff???