first off crankcase, why use obd II? Especially in a obd I vehicle? The good theing about obd II is that every time the mil is on you have to pay ford or someone with a genysis scan tool to see what it is , unless you know what your doing which a lot of people dont. second thats a lot more work i.e : drilling holes in exhaust for the 4 o2 sensors, setting up the DLC (data link connector under the dash)
It WOULD make more sence to do an obd I swap. because all you do is swap harnesses and engines. not to mention obd I is just as good and has half the sensors/ wires. also a lot of modifications will illuminate the MIL because everything on obd II is computer read and thats more work down the road for adding mods.
and no there is no fabrication that needs to be to the front driveline , you can buy and oil pan off somewhere ive seen ( cant remember the site) or you can fabricate one if you can weld. advance adapters makes parts to keep the factory t-case and shaft. they make that for the aod and the t-5.
OBVIOUSLY