Towman is right. Its a good thing the crack was obvious or you may have reinstalled it thinking it was fine. So how is the condition of your cylinder walls? What kind of ridge in the cylinders? Do you see any crosshatch pattern left? By the looks of those pics, the cylinders look to be very glazed over and shiney.
If bucket is sure those are good workable heads he has, you might consider finding out what his price for them is and shipping. If they are functional in good shape, you'd be better off with good used heads than a new reworked resurfaced head. You don't want to raise your compression ratio with new heads on an older tired bottom end. I'd also have waited to put the other head on and replace them in a set, even if it was used set. Or, I'd have bought 1 good core and had both reworked but not resurfaced if they didn't need it. Of course resurfacing won't hurt much if you are using a thicker compostion gasket and the OEM was much thinner which usually is the case. But even new ground seats and new valve guides will raise compression a hair just in being new and sealing better. Good Luck Dawg, keep us updated.
