39 Chevy Looking for Info

[Russ65C10]

I have a couple of quick questions to start me out a little more informed.

My Dad has a 39 chevy we want to get up and running. He's got everything but the driveline (has the rear axle) and bed. He has the running boards and rear fenders just missing the rest of the bed. He's not looking to do a full resto of it he just wants something he can drive once in while. So here are my questions:

1. Is the cab the same as 40's trucks?

2. Are there any newer axles that are a direct swap or swap with minimal fab work?

3. What's the cheapest least expensive way to get rid of the strait axle on the front?

Thanks