[ZeGermanHam]

Originally Posted by JLBIII

I have the same problem at 2800rpm. PS car. Replaced clutch fan with flex fan. Problem still there. Got correct width belts and new drive and ps pulleys. Double pulley for water pump was not available. Still there. Had to replace ps pump. Still there. Water pump is a flow kooler with 2k miles on it. Car is down right now for some upgrades. Thinking about getting a set of billet aluminum pulleys.

I bought the aluminum pulleys from Ram Air Resto. Took about a year to receive them at the time, but they work great on my 66 with PS, AC, high flow WP, and HD fan clutch. Gates belts, no squeal under any conditions. They're quite costly, but they work great and look nice.