P/S belt squeal

The pulleys you have are either pre-'69 or for a heavy truck application with a wider groove and the larger PS pulley od. The good news is it looks like they all match for the PS groove. Try a 9 instead of a 7 first digit for gates (9465) or 17 instead of 15 for the other numbering system for a 1/2 inch wide top. and grab a couple longer belts to find the best length, then return what you don't need. The wider belt will require adjusting the PS pump inboard for the same length circumference so it may require a longer spec.

Cogged are made for smaller diameter pulleys like alternators.