so, are these the stock valve springs for those heads, did you settle on a cam, does everything else bolt right on to these and any guess how much this should raise to CR ?
The heads I picked up are pretty much stock. Summit was sold out of their .454 cam so I went with the Crane XE262. No idea how much the CR will improve but from what I've been reading on this forum it should be around .1 so I'm guessing if I was at around 8:1 I'll now be around 9:1. Kind of hard to give you facts being it I never had the stock heads tested for CR.