The good news about a cracked head is that while you are at it, it's not too much more to get the heads ported for a nice little power and efficiency boost. The bad news, though, is that the "while you're at it" list is long and pricey..
Clutch & flywheel
Valve springs
Re-grind valves
Rebuild lifters
Rebuild fuel injectors
Cam pads/ramps
Chain tensioners
AOS
