[GRX]

Good thing you did not magnaflux those "scalloped" light duty twin cross over port heads to disappoint yourself. Cracks in the center exhaust seats at 1 and 11 o'clock positions were/are the norm raher than exception. Hopefully they won't worsen and result in burnt valves any time soon. And hope you removed all block plugs so as the clean lobe metal from all the oil galleys. Much work but will save your wallet later on as said.