I'm trying to find a great pair of heads for a 460/525 engine and I think the Kaase P-51 heads look very nice, but are they worth almost 5,200 ? I drive my 427 Cobra replica mostly on the street but also some track days. I'm wanting between 650-750 HP/TQ, roller lifters etc. I don't see going over 6,200 rpm or so. I drive my Cobra hard, as it should be ! It's not a hot rod ya know. I know heads are can gain or lose a lot of power, but 5k plus rockers, springs, pushrods etc. is a lot of money, so are they, plus the rest of parts needed,... worth the price or overkill for my needs ?