I have a 1967 GTO with a 1972 455 engine.
I'm trying to figure out how to quiet my belts (AC/altenator/Power Steering).
I tried spraying them with STP Belt dressing which fixes the problem for about 5 minutes and then the noise comes back.
I installed NAPA belts about two years ago.
They still look new as they should, no glaze, no dry rot or cracks.
I only have about 200 miles on them.
I checked the tension which seems to be correct.
Should I scrap the belts for a better brand?
What is the best brand?