This winter I have decided to change my H.O pump to an S.O, get an o-ringed head, install HD pushrods and springs, put arp studs in, swap in a ats exhaust manifold. Now I am really tossing the idea of installing a cam and lifters. With the head off can I easily swap lifters or do I have to drop them into a lifter tray and all that good fun? What will be the easiest way for me to do a cam and lifters? Since we are along the line of lifters is it true that I can get cr lifters and they will work better? If so does anyone have any part numbers?