driveline change

[tttuba]

I have a 47 GMC 5 window. It is pretty much stock and was restored about 10 years ago. It is in need of some warming up. I plan to go through the whole body and do the repairs. Since it is totally stock except for the prior owner put front disc brakes on the car, I am hesitant to do much more in changes. However the drivability of the truck could be improved with a newer transmission. drive shaft and rear end, power steering and a tilt column. I am looking for an opinion first if I should do such changes and second what would be the suggestions of what to use if I take that on. It has to be without a lot of cutting and welding. I can do it but not a professional at welding.