Isn't there a drive shaft from the case to the front differential that can be removed?
It would be cheap and easy as long as there isn't a slip joint into the transfer case. And cheap and easy is a rare combo these days!
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!