Front wheel drive Four wheel drive?

[brothers69c-10]

Justbought this 78 3/4ton 4x4 3 weeks ago. Put a motor in it and have slowly been fixing little things on it. Long story short, i put lockouts in it two days ago. When i went to pull it out of the garage i could feel it shift into gear, but it wouldn"t move. This is while i have it in 2high. So i thought maybe it was just cold so i lock the front hubs in, get in it and backs right out no problem. So i turn the front hubs to the free position and try to move it again and it wouldn't. It acted like it wanted but it just wouldn't move. After screwing around with it the only way i can get the rear axle to engage is to have it in 4 high. After some thought, since it is still a full time transfer case, it seems to me as if its treating the front axle as if it were the rear, and the rear as if it were the front. So i guess my question is,
Is it possible to put something in backwards in the transfer case?
or do i just have the worlds only front wheel drive 4x4.

Thanks in advance for all your input.

Mathew