I modified FJ60 housings for my 69' SIIA build, shortened the long side and lengthened the short side, gives 4 wheel disc and FF rear, using the FJ60 diffs, RCV custom length axles, guaranteed for up to 40" tires, can order them in 300CM for even more strength.
The front housing with sheet metal diff cover, welded 3/16" reinforcing ring on, drilling and tapping to bolt Ruff Stuff diff cover on front.
With Ruff Stuff diff cover sitting in place, You can see the reinforcing ring and 4- Plus housing sleeve extension on short side and ring on long side.
The Ruff Stuff Disc/FF flange where it will be welded on once my 300Tdi, Stubby R380, LT230 and Rocky Mountain parabolic spring arrive so U can set the pinion angle.
With the front spindle sitting in place.
The spindle with recess machined for the Marlin Crawler Eco seal to keep diff oil inside, running greased hub bearings like on front.
With junk front hub sitting in place for mock-up.
Marlin Crawler billet steering arm and 25mm steering pin upgrade kit. The two hex head studs are for the bottom billet cap, they just held it on for pic, those are two of the ARP 2000 studs, the other two will be put in when ready to actually use.
The lower billet cap that increase ground clearance about 3/4" and the grade 12.9 hex head studs. The bit of a cut is welded up and ground down now.
Cutting the rear housing flange weld so it could be slid off the housing.
To reveal this machined surface on each end and was used to index off of the do the bit of machining.
I have a FB page 69' Series IIA Build, shows the build and more details about converting FJ60 housings so the pinion stays in same position side to side and much more. I widened the front axle 4" for a 59" WMS to WMS and the rear 2-1/2" to 57-1/2" WMS to WMS, they can be easily made wider or narrower. Anyway, just food for thought.
Cheers, Allen