Anyone know what the stock backspace was for the 1984 Z28 wheel? Also, anyone know where I can get a good set of Keystone Klassics, 15 x 7 for the same car?

 

Look at the bottom of this page... there is some info on the 3rd Gen wheels, which it indicates were 16x8". Appears the later years had different offset/backspace front and rear, but the situation with the 84's isn't clear.

http://www.skulte.com/adapterfaq.html