good luck, those are a bastard to R&R while out of the truck let alone leaving it in the truck, and there isnt really a way to leave it in the truck because its the main thing holding up the TTB
i could be way wrong on this but i have personaly tried doin it in the truck and it was almost impossible
I did mine... you have to really, really think it through. It's not only hard but dangerous, if that TTB gets away from you it'll break stuff in its way.
I used a couple of floor jacks, several jack stands, and backed up everything with stacks of bricks and 2x4s. I used an air hammer to punch out the bushings, and had to modify the press a little to get clearance to put things back in.
It was several years ago, wish I had taken pics... I remember pulling a bolt and having one TTB arm slam into a stack of 2x4s. If they hadn't been there, it would have been a real mess. The movement was not what I expected. Proceed with caution if you go this route.
Also, all that work didn't cure my Death Wobble. It was the TTB bracket. One hole got wallowed out. Re-welded and drilled it, then got a new one ordered. Been good for 3 yrs now.