Riot is talking about the snout the clutch throwout bearing slides on, it's part of the transmission and not the bell itself. When installing the Ranger torque splitter said snout gets in the way, it will not slide into the Ranger's internals - the shaft will, the snout will not. The solution is to cut most of the snout off, IIRC the part that protrudes from the transmission case's face cannot be more than 3/4" tall or it will bind on the Ranger guts. Should be a picture of that in the install directions that came with your Ranger, or you can download them from the Advance Adapters website and it will show it there.
Also, the axles gearing, it's only an issue when your 1st gear isn't low enough - there was a member here not too long ago who replaced his diesel T19 with a gasser one just cause of that issue, he had 3.55s and kept burning the clutches under load. With the creeper gear of the NP435 you should be just fine tho. I do have to ask, where are you getting these 3.27 gears from?