You use the same crossmember, but you need a junkyard mounting plate that fits on the bottom of the transmission. I couldn't find a mounting plate, but you can make your own by drilling holes in a piece of 1/4 inch sheet metal. That was the only thing I had to fabricate.
Then you need to modify your driveshaft(s); the length of the overdrive transmission let me drop the dual driveshafts and go to a single driveshaft.
You need a new yoke to fit the output shaft of the transmission.
The only extra wiring required is for the overdrive; just give the overdrive 12 volts to operate. But, the two-prong overdrive plug is only used on 91.5-93 Diesels since everything else has a third prong for lock-up. So unless you have a better junkyard than the state of Arizona you're going to have to rig something to work there. I found a standard molex plug that with enough sanding around the connecter and finesse it decided to not fall out. Then I RTV'd it into the plug.
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