Alright guys, I finished up the install of the SVT UIM on our Cougar and when we started it up the engine is rocking (front to back) pretty bad and there's a loud tapping which almost sounds like bad lifter tap.......the problem is I didn't touch anything except the UIM, LIM (to clean it) and the other misc stuff to get everything out.

Any ideas what could be causing this? I replaced all of the gaskets, but I can't think of anything that would have been done to cause the tapping......I'll try and get a sound clip here in a sec.

--Adam