5-speed swap?

[Scott70Chevy]

I've seen a few posts talking about using a 5-speed out of a full-size truck, but I haven't seen enough details to determine if I should consider it.
1). I think I read that the NV3500/4500 has integral bell housing and you would have to use the hydraulic clutch set-up. Is this true?
2). If so, how much trouble would that be? What parts would I have to take off the donor truck to make sure I got everything needed to do it right?
3). And, what are best years to get the tranny from?