NV 3500 5-speed in a Square

[bob_o]

Has anybody done this swap? My '75 Sierra originally had a 3-speed Saginaw, currently has a TH350 and I've been thinking about going back to a manual, but something a bit more modern. My truck is my daily, has a 290hp GM crate motor with a stock 3.73 (I think) limited slip rearend. I don't plan on ever doing any major towing with the truck. Just want a bit better mileage and have always preferred a stick. I know that I would have to upgrade to a hydraulic clutch/slave setup, but I'm not too concerned about that. I found an NV 3500 on the local CL for a very reasonable price and it appears to be in good condition (seller claims it has been recently rebuilt). Just want to know if these transmissions are worth the effort. Thanks in advance!