Did the guy survive??
I would probably personally take parts off of the wreck and put in yours. There is gonna be a ton of pinched wiring harness's and such in the red truck that will cause nothing but endless headaches. Strip out everything salvageable, sell what you dont need and keep the engine for a spare. Never hurts to have a solid, known milage clean 7.3l laying around. Plus there is a huge market for used parts for these rigs. And yes switching the auto PCM
into your truck will run the automatic fine after the swap. You shouldnt need to buy too much, only the parts that are absolutely destroyed. Your going to need atleast the trans, torque conv., flexplate, trans wiring harness(plug+play), driveshafts, PCM
, Steering column w/ shift cable, dash that has the gear indicator, floor pan to cover 5 speed shifter hole, crossmember. And then the front axle and everything needed to put that in. The trans swap will be all bolt in. Would be easier to get a 4x4
5 speed and just put the trans case on that and make driveshafts then add the front axle.