I have the head torque down with the 606 gasket. Ill put manifolds on and report back tomorrow. Im worriedat the least its going to leak oil from the timing chain tensioner oil gallery. I ended up dissassembling the gasket to deburr it after drilling it and decided to coat all layers because I don't really think this is gonna work. Especially with the messed up coating and me messing things up even more. It'll probably be off again next weekend and Ill use a dealer 603 gasket (trying to get an erling instead of reinz) that time if this doesn't seal.

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1981 300SD 512k OM603