I have a 90 f-150 with the 5.8w and I want to get rid of the smog pump and I want to to know if anyone has done this and what the belt # is

 

I have 302 with no air pump and it's got ac and the right belt is about 88.5 in long , you can probably go .5 in shorter but not too much longer.On a 5.8 you have awider engine and slightly higher so you probably need something in the 90-92 in. range.