Can I put 77.5 + Spindles and hubs on my 70 dana 44?

[gmc4x4can]

I'm not having much luck finding a 71-77.5 replacement hub for my disc conversion, but There lots of 77.5 and up spindles and hubs around my area. say I've got the correct knuckles and backing plates already, would it work if I put the 77.5 spindles and hubs on my axle? the hub is basically the same with bigger bearings, my only concern is the spindle, if there will be enough axle shaft sticking through for hub engagement...