It would be a whole lot cheaper if you got your wife her own truck. cool I dig that truck just the way it is-crashbox and all. It's got plenty of CHHARACTER!!!!!!!
The reworking of alll of those items will be a major undertaking and in my opinion will diminish the value of the vehicle. How many people can drive a crashbox nicely? Along with the foot stomper, you have a built in theft deterrent stem! Disc brakes will require new wheels, backing plates, Master cylinder. the new tranny will require lots more work. The open driveline will be too wide in the rear and look goofy. (I'm gonna hear it for that one!) Throw out all those friggin' magazines that say you MUST change this and get rid of that! Do you really want to drive 80 on the freeway with that truck? Call Patricks and get a 3.55 ring and pinion set and redo the entire original brake system.
And if you don't get another truck for your wife, then teach her how to drive this one. She'll then be able to drive anything on the road! You have new trucks to listen to music in and drink coffee in and pass everything in sight in. Have some fun with this one! (All those who were offended by this post, please accept my apologies!)