(That 12v Cummins Engine)
(Timing Advanced on the VE Pump)
(New Process 205 Transfer Case)
(Transmission Pan - Yuk)
So getting the thing home I started looking at the totality of the truck. The 1990 Owners Manual indicated that the 12v was definitely from a 1990 Dodge, and the engine plate showed a manufacture date of 7/1989 which lined up. The dash must have come from the 1990 too, because the speedometer went to 100mph rather than just 85mph, a change that happened in 1990. The ODO didn't work but the seller told me it had broken not long ago and was estimated to be at 150,000 miles, showing 134k. The dash and HVAC were for an AC truck, and the 12v has an AC compressor on it. The radiator was new and has top driver's side output for an intercooled-style 12v, but the water neck on the engine is original and turned for a passenger's side rad output. There are 2 upper rad hoses clamped together to compensate. The VE pump appears to have been clocked forward 1/8" due to the little marks made on the back of the timing cover so I'm guessing the "free mods" have been done. Both front and rear axles had tags indicating 4.10 gears and they did check out as a Dana 60/70 combo. The transfer case leaks a little oil but otherwise did check out as a NP205. The transmission was a mystery. Being an auto trans at this point in time (1989-1990) it only made sense to be a 727. Buy why the heck would the axles be geared at 4.10 if that were the case, because anything other than the 3.07 D61/71 combo meant I'd be limited in top speed? There was no TPS on the engine, so maybe it was originally attached to a manual transmission? The axles were surely from the 1990 truck because they were definitely a D60/70 combo, heavy duty, which matched up for a Cummins truck but not for a gasser W100, which I think would have more than likely had a D44/60 combo. And I found a plate indicating that somewhere along the line this thing had a snow plow? Is that why the wiring seemed so sloppy, because it was removed? Is that why the transmission pan and crossmember look like they've been sprayed with salt spray so much, while the frame is otherwise in good shape?
Long story short, I found that the axles, at least the front axle, is a 1989 Dana 60, which differs from the 1990 due to the size of brake rotors and calipers. When I had asked, the seller told me he had gotten parts for a 1990 D70 axle when redoing it and the axles/suspension was from the 1990 swap. Wrong. (Seller didn't even do the D70 himself, the receipts show a different name - previous owner.) I originally bought parts for a 1990 D60 but found that the rotors and calipers just did not work. 1989 rotors and calipers did. (Side note, does anyone want to buy a set of unused AC Delco rotors for a 1990-up D60 axle? lol)