I came back to the shop today and I purchased a winning combination of belts that I have been running on the M1009 , M1028 and M1008 vehicles The 3 belts I have been buying now are Gates.
Gates XL 7450 13/32" X 45 5/8" OC (10mm X 1158mm OC)This the first belt on the rear PS pulley,water pump rear pulley, bottom rear pulley.
Gates XL 9580 1/2" X 58 3/8" (12.5mm X 1485mm) This the second belt on the center of the water pump and bottom pulley and the front big power steering pulley.
Gates XL 7475 13/32" X 48 1/8" OC (10mm X 1221mm OC)This is the one for the passengers side alternator, water pump front pulley, bottom front pulley
These belts work super good and I have them on 4 of our CUCV vehicles right now. I just put them on my Red M1008 pick up my daily runner and they have tons of adjustment and no squeal on start up and when using the truck to jump start equipment and other trucks. I call it my winning combination because they work and do the job. They are a bit tight to get on but once on the seem to hold up well for me. I run several of these vehicles hard day in and day out. OFF road on 2 of them on stone, mud, and dirt.. Thank you for looking have a nice day.