Here are some thoughts based on my background on GTOs.....the GTOs as well as all the muscle a body cars back in the day had what is commonily referred to as lite steering like no road feel and took 4 1/2 to 4 3/4 turns lock to lock the wheel. GTO owners called this forever steering....plus the steering wheel diameter was like 15 inches across..
The hot set up in the late 1980s was to drop a GN steering box into the A body cars..this required a special crush sleeve to owners could use their original hose connectors...I would buy them from Lee manufacturing which was mentioned earlier in this thread.
Ratio numbers that get thrown around can be confusing for most people myself included. My mechanical skills are quite limited.
The whole key that makes better sense at least to me is how many turns lock to lock? Also does it have road feel rather than very light steering.
I think the Buicks lock in under 3 turns....which you can see makes a huge difference. I think some of the F bodies maybe the ones with the WS suspensions do it even slightly quicker like around 2 1/2 turns.
As for the rag joint issue and switching something out may be easier to just replace the rag joint with a new one....
As it has been pointed out companies do make quick boxes today....boxes in our cars are the same as the monte ss and 442s the code on the good box is YA....I used to sell them to GTO owners back in the day.
Course now some of the cars have I believe electric steering....which appears to be the next upgrade on the horizon.
denniskirban@yahoo.com
Jeeps have a lot of GM parts in them....