Another thing that can cause wheel lock at all the way over position is not having the pitman arm centered with the box. You can use toe-in adjustments to plus and minus the problem and center the wheel offset on the box so the car drives fine and wheel is straight but locks at full over. The lock-up is one tie rod overextending and has no leverage to pull the wheel back to return.

This probably isn't your problem since the car drives fine, I had it on a classic I bought when backed out of driveway and turned to go down the street. Wouldn't go back. A buddy got out and grabbed the tire and started it toward straignt while I moved the wheel toward straight and the bind released and all was normal.

Towing with no dolly means you are pulling the front sideways around corners. Will wear out lots of stuff if done a lot. Probably your ok with limited use and low weight. You might look at the front end design of the new Saturn they are advertising you can pull from a RV with no dolly and it will track.