I was reading the thread by jefflock on removing the thrust block in order to use aftermarket axles. Got the opposite problem. I'm using shortened and resplined LBP axles and have a 741 case with sure grip that has had the thrust block removed. Will this have to be disassembled in order to install the thrust block. I looked through a couple of FSMs I have and can't really find the info. I suspect it does; just wanting to make sure.