On the topic of the NV4500 swap -
Old school FJ40 guys know that you can bolt an SM465 right up to an F-Series motor with the use of a 1F 3-speed bellhousing (miraculously they have the exact same transmission front face).
The input shaft and front bearing retainer on the GM NV4500 and SM462 are identical, the only difference is the bolt pattern. What this means is that the 3-speed bellhousing is an excellent place to start.
The NV4500 replaced the SM465 in 1992 and is MUCH more refined and has overdrive, so it's no wonder tons of GM truck owners swap them, all they need is a bellhousing. One man however was to cheap to buy said bellhousing, and did this:
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This should work for bolting to a 3-speed bellhousing as that's the same pattern. I was at first skeptical of the ability to get nuts on those studs inside the bellhousing until I had the inspection cover off my truck and saw that it isn't that bad.
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So here's my parts list:
-92-95 GM NV4500 transmission
-Toyota 3-speed bellhousing and inspection cover
-10.5" Chevy clutch disc (read a few reports of 11" being just a hair too large)
-Special pilot bearing - PN # 202RRE
-Throwout Bearing Sleeve - 1.5" OD, 1 3/8" ID, ~62 mm long
-80-86 Dana 300 Transfer case
-WFO custom Dana 300 output yoke for Toyota driveshaft (2)
-Toyota pickup slip yoke (2)
And probably a ton of nickel and dime stuff like shifters, boots, hardware, rebuild kits, and a custom crossmember just off the top of my head.
The goal is to have everything rebuilt and clean before I take my rig off the road. I foresee downtime to be one to two weeks at the maximum -
Pull Toyota trans, install everything and test fit crossmember, take measurements for transfer shifter, remove, final weld, build shifters, install, interior modifications, done.
This is going to happen, slowly, but it will.