A Body Disc Brake Swap 101

If the torsion bars aren't released first, that knucle and upper arm assembly will come out for sure. It wont be so easy going back in.
Try your diagonal cutting pliers to pull cotter pins. Lever their jaw against the nut in a can opener like motion ( for lack of a better term ).
I rarely use the tapered nozzles that come with products like silicone. Most of them are closed end. Since the flexable brake fluid line will be replaced, cut it and plug it with the tappered nozzle thingy.