Hey guys need some help! Ok so I did some swapping my old motor had no a/c or smog pump, took for ever to find a belt, now my new engine has a/c, p/s, and no smog, all factory pullies and was wondering if anyone new the belt size or have a part number I have run into so many belts and they either to short or to long, I did find one belt that worked but problem is its to thin it's not wide enough parts store told me they don't have one that size in a thicker belt, I know they make it can anyone help me

 

Take a rough measurement with a string. Take that # along with the old belt to the parts store. If the guy /gal behind the counter is good, they'll get you something that will work. Belt part #'s are actually just the length/width of that belt.

And if you have any other questions, post them in the Tech section for your year Mustang. That's where these types of questions should go.

Good luck