Originally posted by DemonSVT:
My advice (if you really want to lose them by running a hybrid ) is to tap the holes and plug them with a hex plug. Loctite or JB weld on the threads.



If only that would work. Any hex plug large enough to seal the oil return holes would need to be drilled into the water jacket next to it = no worky. You could try to drill two small ones side by side into the rear edge of the block, but then you'd still need to lay some type of epoxy over them from the top side to seal it off.

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