69 Dart Toe-in Problem

Say, I have an issue with toe in on my 69 318 Dart drag car. The local alignment shop can get the right side to actuate up and down satisfactory but the left side will toe in over 1 inch. Here is the parts list:

-73 Duster disks, spindles and rear mounted calipers
-73 Dart drum upper control arms w/ big ball joint
-69 Dart lower control arms
-69 Dart tie rods and other arms w/ PST bushings
-no sway bar

He asked if the car had been hit at one time but it hasn't. We noticed it more now that it raises the front end longer down the track w/ a different engine combo (turbo). Drag only car.
Thanks
Ryan

It is not clear if you are talking about the TOE or CAMBER from your description, or if perhaps the issue is a radical change in one of these during suspension travel.

Sorry, it is a radical change in the toe when the suspension is traveling. He did not say anything about camber.

Quote:

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other arms w/ PST bushings

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First off, let me compliment you on how well the turbo slant combo runs. I watched a pair of videos in hopes of gleaning from them some info on the driver's side suspension action. Being shot from the right rear and a completely 'nother car, that was no help, but I was appropriately impressed by the performance.

Anyway, were this car to present to me with the complaint you describe, the thing I would do on the rack is attempt to duplicate the symptom statically. In other words, quantify how much toe shift there is by measuring it at different ride heights, done by jacking up the nose incrementally. Since the combination of parts you describe is very common, I would not expect to see much toe change when doing this test.

This would leave as the cause something physically shifting [that shouldn't be shifting] as the car drives down the track. Possibilities to investigate:

a. Non-rubber LCA bushing that allow the LCA to move (I'm not a big fan of poly LCA bushings).

b. LCA pivot shaft hole in the K member ovalled out.

c. Steering box/pitman arm not staying put.

Hope some of this helps.