It's been a while, but I thought it was easy.
I did not have to take the axles off the diff.
I lowered the diff with the axles still attached, and rocked the tank out.
Four boltz for the axle, few more for the shield, maybe six or eight (I forgot) for the diff...hoses and wire connections..remove exhaust.
For a first timer....I'd say four hours at the most.