Believe maybe you've seen me post this link around 94cherry to a brand new Bosch 67617 fuel pump module for a 93-94 4.0 or 5.2 which is an outstanding price at $120! Free shipping, comes with a tank seal, runs cool/quiet, and Bosch is OE.
As far as temporarily installing your used pump/module from your 95 4.0 into your 94 4.0 it most likely wouldn't work correctly. I stuck it in the above link compatibility chart and it shows it's incompatible.
And in looking up fuel pump modules in the 94-96 parts list it shows the 94 OE as 52005099, which the above Bosch 67617 replaces, while the 95 takes an OE 52018796 which is different. May be like my 96 4.0 where only that year is specific to a certain pump module.