So me idler pulley on my 7.3 locked up. Amd afyer pulling it off amd going to the parts storebtp confirm that the closest palce with one was over am hr awa. I bought the pulley amd decided u was gumma fix the old One. Well that didnt work amd i was running late to go play at duhons (local mud hole). So my friend looks in his truck and finds a bramd new chevy 350 pulley and wouldmt u know it fit!! Fits a little tighter but works and has been workib now for almost 3 weeks. So future tip for those that fall into this situation