today, I was porting my head, just finishing up, been coming along nicely until I cut through 1 exhaust runner, and noticed another was almost all the way thru, and with a little poking, it was thru. so I can ither have it welded or buy a diffrent head, so I called around and found a place that might have 1. I asked for a '78 Head which would be better flowing, and have hardened seats arleady, so I wouldn't need that done to the head, like I would this 1.