Originally Posted by
powerslide
Stock 400 blocks are a ticking time bomb. Get a SHP block or do it in a 350 block. It really depends how stiff of competition you are running against on what you need. You are 68 and unless you have been racing all your life i don't think you are going to run with RTJ not trying to put you down lets just be realistic. If most everyone has the weight break and spoiler advantage from the spec you will need one as well to stand a chance. If i was going to do it all again new i would build the spec concept motor. You should be able to build a drivable 600hp motor that lasts.