Does anybody know the specs of these head castings from a 575 SCI? Casting number 12562934. Should i work with these or something else? As stated in another thread, i'm going to change to a roller cam because the original flat tappet is whipped out. Also went with a 8:71 blower and whipple intercooler manifold since the blower is trashed also.

The Edelbrock marine heads were good for about 50 HP on mine.

I will have a set with about 15 hours for sale soon. (don't want to run aluminium heads in salt)
They will be priced right and should be like new. Just gotta get them off the motor.