Originally Posted by EvileyeZ88
I can't remember who it was, but someone in here found a tap and bolt size that fits the inlet for the air pump on the block. Negating the need for the plates.
According to my search its 3/8-16, tap drill size is 5/16. Buying both from Enco tool as a backup. Also buying the proper dill and tap for the stock size and the helicoil.