2000 Ford F150 5.4 triton v8 4x4
AC Bypass. I been banging my head against the motor block. I changed the idle pulley. Belts I have tried squeal like a pig and the one I am supposed to use will just not go on. I have tried k060795 squeals, 800k6 squeals, 6k795 is one I just can not get on

those ac bypass systems often do not work right. I assume you bought a bypass pulley kit, you would need to know what belt that kit uses. But if you are trying it just by removing the AC compressor and trying to put a belt on, that' will never work cause it wasn't designed that way and no belt is made for that