As far as the trans goes. I can make the same comment as Diesel Dog. Mine had 124,000 on it when Brian took it apart and it was on its last leg. It had less than 10,000 miles on it with a BTS valve body and DP-Tuner
tunes. I took my neighbors trans with me, out of his 02 F-350 with 365,000 on it and when Brian took it apart it was the original Ford trans, never been apart, per Brian. My neighbors truck had pulled a single car, car trailer, all its life. Florida to Penn and back to Florida. Brian's comment was it had been in OD with the TC locked and the trans wasn't doing any work, so to speak. Mine on the other hand had the VB
installed before Jody did the live tuning on it. After that it had been drove hard and the trans was giving up with only 10,000 miles of use. When I ordered the VB
Brian said that I was sitting on a grenade...
If you drop the money on a converter you wont be able to reuse it when you get the trans rebuilt. Just another thing to consider.
One word of advice would be to replace the flywheel while it is apart. Not expensive but just problem preventive. My neighbor, while thinking his converter had torn up, found the center broken out of his flywheel. After the trans was reinstalled... Its 4wd too.... You could not actually see the crack but if you sprayed some WD-40 on one side it would show up on the other side...
As far as Brake controllers go I purchased a Brake Smart and have been extremely pleased with its performance. I can pull 12,000 with my dump trailer and pull off after its dumped and never touch the control. It works the same empty or loaded, without question. Every time. Its pricey but its sweet.