This sounds like a killer combo, and with the right tires, perhaps 35s, could suffice for a combination that results in overdrive gearing in 4th gear at cruising speed.

My 401 is coming along, and I was literally given a NP435 and NP205. Both are mated and just need the correct bellhousing to adapt to the 401. The 435 has a damaged input shaft retainer on the front, but aside from that it's ok.

After that, it's just a matter of ensuring that my existing clutch linkage works.

But then there's the gear shifter, and the issue of clearance under the air conditioning vent of the 82 Cherokee.....

That will require a modification, and I am thinking it's the red wrench... as in flame, and lots of it to bend the stick....

Anyone done this?