I have a J pattern dana 20 that has been converted to twin stick, the description says only works with T pattern transfer cases. Will this work with my twin set up or is there another adapter?

This kit does work with the J shift Dana 20, but does require switching to twin sticks. The stock T shift handle can be modified to work, but not the stock J shifter. The twin sticks for this kit is #8323, available in J or T style. The 8323 twin sticks are specific to this swap.