Once the gear setup is correct, torque all bolts per specification and re-install the lock wires. Re-assemble the rear end into the housing, re-install the axles, electric 2 speed shifter, and fill with the specified lube. I used 85W-140 lube.
Not a bad job, just all the parts are very heavy!
See my link showing how to install OEM A/C in this truck.
http://67-72chevytrucks.com/vboard/s...d.php?t=721374