I ran a MK 1 Rabbit with an open diff for years. If you choose to do the same hear is a tip. Run a softer suspension set up. Somewhere in the area of 400lbs. front and 350lbs rear spring rates. No front bar and two rear bars. Make one bar a good one like Shine sells. If you can find a GTI bar or one from a convertible that will do for the other.

Soft -yes, Lots of body roll-yes. But more traction than with the high spring rates.

Tony