there used to be a thread for belt sizes..but now obviously its gone. i just slapped on a '622' size belt for my old 4.0 pulley. but now i just installed a 3.8 sc pulley and a 2.5 idler pulley, i tried to tighten it up n i came to a point that the idler touches the compressor pulley already (took off the guard bolt). burned a lil bit of rubber..hehe! so yeah, i had to loosen it just enuf to hav a lil clearance. n now, i get those nasty belt squeaks again. anybody knows the size for a 3.8 sc / 2.5 idler set up? thanks in advance