I can’t help with placement, but we just put a set of Juliano’s belts in my buddy’s 56 Nomad. First class stuff, buy the mounting hardware too.
Some years ago I bought the “correct” belts for a 56 for my 55 bird. Had the correct green color, and the fabric to metal buckle. I did not spend the uptick for the “Ford” logo on the buckle. They were expensive, but also first class. I’m not sure they show on the site, so try calling.
http://www.ssnake-oyl.com/mm5/merchant.mvc