thanks for the input everyone. the rear axle is operated hydrovac and ive never shifted it while driving anyway so i wouldnt be too worried about one engaging faster than the other. another potential problem, now that ive been searching nonstop today, is that i have a pto drivin pump for a dump as well so i dont know if a transfer case would fit. and the military trucks seem to be nearly impossible to find, as if a 46 chevy isnt hard enough to find anyway :/