I did have to change out my power steering pulley for another that game me more clearance at the upper A-arm. I also had to use an elongated pressure hose adapter to get clearance for the pressure line A/N fitting. I laid a straight edge across the balancer and compared it to the PS pulley...the pulley needs to slide on a little over 1/16" to match the balancer.

That will cause that noise on a surp belt setup.

Well, I pushed the PS pulley on as far as I could go with out hitting the pressure line fitting. The alignment with the balancer isn't exactly perfect, but as close as I can get it with my combination of parts. I started the motor up and got it up to around 140 degrees with no noise at idle or when reeved up. Hopefully it stays away!

Good for you! Simple fix is always good!

I ran into a noise problem like this on my LS swap. I am using Fbody accessories. After the engine was warm I had belt noise. I replaced the idler, the tensioner and a new belt from NAPA. Thought it might be a bearing in the alternator but I had it checked and it was fine. The guy that checked the alternator said get a different brand belt. I went to Oreilly's and I think purchased a Goodyear belt and no more noise. Been great for two years now.

I ran the car up to operating temp the other day and I can still hear a little chirping at idle, but nearly nothing when the motor is reeved.:bang:

Goodyear Gatorback belts are the best for removing noise. I have one on my 67, that had chirping issues. I was running a Gates previously. Also ran a Gatorback on my C6 vette with an A&A S/C.