Only thing I had to do was change the pinion yoke to match the driveshaft. It's been some time since I did it, but I think I was able to swap the one off the 8.8. May need an air impact gun to get them off!
Oh ya, there was a elec. connector on the 8.8. I removed it and zip tied it up to the frame. Must be for abs, but I'm not sure my 8.8 had it.
If by brackets, you mean the spring perches, youch! Got to get them placed right so there is no drive line angle to the pinion or there will be troubles.
Where is your speedo sensor? My friend with a 92 150, I6 300, mazda stick, and bw1356 had the speedo sensor in the 8.8. He swapped a 9", now his speedo wont work because he cant plug it into the tcase or rear end.