Reply to "Edelbrock heads"

I totally forgot to update this post. First I R&r'd the ZF to change the TO bearing and guess what? The bearing was as good as new. The good news is that I R&R'D ZF in about 4.5 hrs, getting it down to a science now, I did replace the bearing with a new one from PIM. It just presses on the billet sleeve, piece of cake. I started it up and again there is was this random noise at high RPM. I called up Jerry at PIM and said that I give up and what did he think. He said did you check your harmonic balancer? I took off the bulkhead and low and behold the outer ring had slipped back toward the timing cover and was chewing it up in a small spot. I ordered a new one from PIM and no more noise. YEHA .... she runs great. Finally what a blast to drive, I drive it constantly and am truly finally enjoying the big HP and the looks. I took a bunch of pics and plan on creating a "how to" for the ZF and balancer R&R.
Oh, the machine shop balanced the balancer (sounds odd) and said it was fine. I should have just replaced it on the rebuild.

Thanks again all that took the time to reply...