Check Out That Chassis
This sounds like this could be a fun ride to sort out. With adjusting ladder bar preload on a narrow car you must go in small amounts. If the ladder bar has an adjuster in the bottom tube you only want to go 1 flat at a time. The other thing you need to check is the rod ends in the front of the bars, they need to be free but not lose. Make shore the front end setting are correct, the castor is the key down track, check your bump steer as you add preload and it shifts the load to the left front it could be changing your tow-in.
President, S & W Race Cars
You can also email Scott Weney at firstname.lastname@example.org