Heads.

Using the rotator will limit the amount of cam lift possible. I see you chose a cam with .462/ .470 lift. Having the rotator you will only be capable of about .400 lift , unless the spring pad area is modified to deal with this. That's an unnecessary expense to achieve what you require. Get rid of the rotator (with its undesirable mass) use the 901 spring and regular intake style retainers with the correct valve lock.