I just picked up a nice set of 049 cylinder heads. I measured a few of the chambers and got a volume of 121-122 cc. I'm running flat top pistons with a 14081045 head and a have a CR of 8.2 with 118 cc. I'm contemplating decking the 049s to bump the CR back to to 8.2 or maybe higher but i don't know how much i can expect to take off. (also my valve lift is about 0.48 but i'd like to maybe got to .54 some day)
I figure if i go more than a few thou, i'll be looking at machining the bottom and sides of Intake Manifold but given that, how much is reasonable to take off? Has any one done this before? How if so how much can i expect to take off without screwing up the head?