Originally Posted by B1duster

I ran an Oringed megablock with copper gaskets and 440-1 heads with no receiver groove, with a 200 shot, for a few years with no problems at all. I used a little red silicone around the coolant passages and a heavy coat of copper spray.
Never a leak of any kind.


about the same here. O-ringed Mega Block, no grooves in the 440-1s, 13.5/1, SCE Copper gaskets, Hylomar for coolant passages...no NOS. Trouble free.


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