93 F150 5.0. Will this fit in place of the smog pump?

 

It does but you still need to run a smaller belt.

I have that one, and what I did was replace the pully with this one:
and replace the top idler pulley
(NOTE: that's a 6.0 powerstroke 8 rib pulley, I had that one laying around but if you find/get a 6 rib version of that size, it would work better.)

That would get you to the stock belt size

 

Thanks for the info. I saw this eliminator over the ones on EBay.

 

So the pulley gets a bigger one that’s equal to the smog pulley. Cool. Easy. Thx.

 

Yep. It's still not the exact size (I wasn't able to find one) But it was much closer than what it came with.

 

Close enough for belt tensioner to make up or still a belt change?

 

Still a belt change, I think it would be 1 size down from stock but I can't remember.