Rear lifting in hard coenering, Too much spring? Options

[retrotech]

I wasn't ready to deal with the suspension yet, but today I was told my the guy behind me. In hard cornering, instead of being flat, thew rear corner would lift. Thats not good. This was the first fairly hard drive, with some R Gruppe cars.
The PO said they were 400#, I assumed he was mistaken, that didin't seem reasonable. He said he has had a track 914, and that is the set up he was successful with. So what do I need to do. It has front sway bar, don't know what the torsion bar is.
What are the suggestions. I don't care about comfort, I just want an optimal performance for street & track.

1970 w/2.8 2000#


Thanks

[slivel]

Keep in mind that with the stock trailing arm, the geometry of the trailing arm-spring-wheel yields a motion ratio of about 1.68. This means that a 200 lb/in spring will have an effective rate at the wheel of 1.68 x 200.

The front geometry is much closer to 1:1 with my coil over suspension. I don't know what the torsion bar MR is. Maybe someone else here has calculated it for the front with torsion bars.