icanfixall
Official GMM hand model
Looky here guys.. I found some NOS 6.9 cylinder heads and the seller states they have lots o stuff too. Look closely at the lower corners of the heads. You will not see the traditional triangle coolant passage. you will see the round passage. The precups are smooth too as are the intake and exhaust valve heads. I do not see what casting numbers these are so I wont suggest buying all the seller has. Remember the early heads had a cracking issue. But finally some oem NOS heads pop up... Cool...
http://www.ebay.com/itm/NOS-NEW-6-9...Parts_Accessories&hash=item5d47bd0f46&vxp=mtr
http://www.ebay.com/itm/NOS-NEW-6-9...Parts_Accessories&hash=item5d47bd0f46&vxp=mtr