What is my Offset?
 

I have a '86 944 na. Is this the early or late offset? What is my offset Front and Rear?

Last year of early offset 944s. 23mm.

+1^ The early off-set is 23mm front and 12mm rear. The differences you will find when replacing the early off-set rims with late off-set rims is the use of 21mm to 25mm Wheel adapters. Front struts, A-arms, and Tie Rods are also different between early and late off-set.