the plugs go to the oil galley and are there for servicing when you rebuild so all the passages can be cleaned. the plate is actually the gasket for those plugs (the o-rings around the plug holes are rubber coated).
you do not need the plate, it does help keep crap out of the wells, but just be sure you put some sealant on the plugs (rtv or equivelant) and you shouldnt have a problem.
if you start to get leaks you will notice oil in the plug wells and misfiring may ensue.
i am deleting this as well, but for my COP upgrade. as long as you seal up the plug threads well, you shouldnt have a problem! gl!
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87 toyota 4x4 single cab short box pickup, 7MGZE.
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