yeah, I know what ur saying. I just figured that u could do that if he said no you could streach the truth when u tell him it's a 390. That site did not have the ones that said 390 on them but I know there out there and, I would almost bet that he would never look past the lable on the Valve cover or air cleaner. But ur right even at 54.99 that could get u 2 or 3 of the 8 pistions needed.