I'm getting some GTA rims for my 85 T/A and I have the drum brakes in the rear, will I still need the spacers ?

 

Are you talk'n about the 1/8inch spacer that was put on from the factory if you had iron drums and 16inch rims? If so, I think you should leave them on. IIRC, the spacer was put there because the alum drums are thicker than the irons and the spacer made up for that. The GTA s should be no different from anyother type of fbod 16s, as far as backspacing goes.