I have a really dumb question for you guys this time. I was wondering if any body can tell me how many inches of lift the stock h.o roller cam in a 88 gt is? Also how much lift the stock springs can handle? Also what would be better to use, gt40 iron heads(off a pre 1997 explorer) or gt40p heads (off a 1997+ explorer) Also which one would be able to handle a f303 cam?