Istzephyr,
Thats what driveways are for!
You live in the southwest.....
Ever since we moved closer to down I have been rocking the driveway fab shop. I still have a shop at work if I need to do something crazy, however I don't use it that much. We have to have two company employees in the shop after hours....dumb rules.....
I think boxing the frame might be a good idea in the long run, but boy would it be a lot of work! I think your talking a full body removal kinda thing. Doing the back half of the frame would be pretty easy since you just have to take off the bed....cab would suck to remove, and welding the front frame with the motor/tcase/trans still in would be harder for sure!
I don't know if you need link suspension on these old girls. I think a set of national/deaver/alcan springs would make a night and day difference, and I have heard as much from people that run them. Follow that up with some good shocks to control a heavy axle/tire/wheel combo and your on the right track.
I think the biggest downfall to the front suspension is the lack of uptravel. As I'm sure you know there isn't much. Even with my leveling springs ( about 2" of lift over new stock height ) I still only have at most 4" of compression travel as it sits. With the cummins over the front axle there really isn't any way to get much more compression without lifting the suspension ( I have thought about lifting the motor 1-2"). I don't want anything higher overall than I have now...so I guess its about making the most of it. I'm guessing some good springs and shocks would go a LONG ways....and larger tire do help a ton also. I think the final step could be to run something like a 2" stroke air bump to make the suspension more progressive. The really downside is that whatever you do, the response curve on the suspension is going to have to be pretty dang steep if you want a soft initial ride.