The 914 I bought came with this Brembo 996 GT2/Turbo rear caliper kit on the rear. The trailing arm bolt spacing is 3" and the adapter thickness is roughly 1 1/4"
Will this kit also work on a (74-89) 911? What is this kit worth? It only has 1350 miles on it.

Thanks for the help!!

I think the the 911 rear spacing is > 3" I have some 911 arms in the garage that I could measure if you want...