[175K911]

First, with Boge struts you really shouldn't change the torsion bars from stock. They're not up to the task.

I ran 23/33 torsion bars on my '86, had tried 23/31 and it still had way too much understeer. So leave your front torsion bars alone and go way bigger in the back. With 23/28 it must push like crazy. But any change in torsion bars pretty much dictates that you'll need some custom valved Bilsteins, or Vons from Elephant. Even the off the shelf Bilstein Sports aren't valved for much more that what you've got now.