I have a simple question. Can you run victor jr heads on a stock 351w shortblock. Mine is a 74. some say you have to dremel the pistons and others told me the valves are just to big and new pistons are needed. I want to see how fast i can go with a stock bore bottem end 351, but if i have the pull the motor apart it only makes sense to throw in a stroker kit wich will cost me more. let me know.