hurley711

iTrader: (5)

I will be ordering PRC 5.3 heads shortly to matchup with my TR224 cam. I had hardened PR installed with the cam about 15k miles ago, should I replace them with new PR during the head swap or will the 15k PR be OK? TIA

'02 WS6

iTrader: (73)

They should be perfectly fine. Are they 7.425 or stock length? You may need to change sizes if your going to mill the heads and run smaller gaskets.

SSTYCOON

iTrader: (2)

they should be fine unless there bent, My heads were milled .030 and still required stock length PR's

hurley711

iTrader: (5)

TSP is going to mill the heads to 59cc, will that be OK? Also, I am running a TR224 114 cam, will Comp 918 single springs be OK? I drive the car only occasionally, and RARELY race it. She hardly ever sees the upper RPMs, should I be fine with the single springs?