The 4.0L OHV engine used pretty much the same Saginaw "P" style pump in the 1st and 2nd gen. However, the SOHC is different in that it uses the more compact "TC" pump.
If you have the OHV, what I would do is buy a pump for say a 94 Explorer from a local store and see if its the same thing as you have. Once you verifiy that the dimensions are the same, then you can return the pump and get an AGR or whatever pump you want.