Hi Ray,
You said you are getting a tapping noise that changes rate with the RPM change... Something in the reciprocating assembly is hitting the pan or windage tray.
You need to drop the pan completely to do a thorough inspection. Bite the bullet and cut the crossmember out, cut the ebrake bracket out, and drop the pan.
Reassembly is easy with a bolt on ebrack bracket and a bolt on cross member. I have both items if you need them.
Take care, Scott
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