I'm doing mine right now. Polish the front pinion bearing area so you can slide the front pinion bearing on. You'll need the correct size piece of tube to press the pinion head bearing on. I made slip fit test side carrier bearings as well. No need for a case spreader. Remember when adding pinion depth shim, add pinion preload shims and vice versa. I've found the pinion depth tool to be inaccurate. Best start with the old shim and go from there. The final install of the carrier should take some press with a soft face hammer to get it in. So you need a dial indicator, torque wrench, marking compound, tools to remove and install pinion head bearing and side bearings, dial style inch pound torque wrench,race drivers for the pinion bearing races. Most of all patience, as every pinion shim change requires preload shim and side bearing shim changes.
Doug