Old Rob wrote:
There were quite a few companies doing the 4WD conversions initially. Downey Toyota was a big one on the left coast. . Almost all used the Dana 44 front end on jeep springs, offset hangers welded to frame, with the Dana 20 transfer case in a custom made, bolt up carrier. They had a short maybe 6" long drive shaft from transmission to transfer case.
I never saw a Downey conversion that used a D44, all I saw used a D30, the reason being the D30 was readily available in the correct width. Any stock vehicle of the day that used a D44 front was way wider & a conversion would have required a cost prohibitive custom width axle housing. Plus if the vehicles being converted used a stock rear axle the D30 was comparable in strength, the D44 was overkill, especially considering the stock engine horsepower. The Downey D30 version was pretty much a stock IH Scout/Jeep CJ unit & used the 5x5 bolt pattern. Since these were 2wd trucks that used a smaller 5-bolt wheel pattern an adapter to convert the rear to 5x5 pattern was included in the kit. The other companies that offered conversions for Chevy LUVs, Ford Couriers & Datsun pickups fitted fit 6-lug hubs to the D30 axle that matched the stock 6-lug rear pattern.
The narrowest D44 of that era that I know of is the narrow track Jeep Wagoneer at 61", a LUV is 54" WMS to WMS. For a comparison a typical full size pickup is 65".
The first gen IH Scout fronts were about the right width, but they were also D30s. When the Scouts went to the D44 front the vehicle got bigger & the axle wider.