Upper control arm
 

My upper control arm is not long enough to straighten out the tire alignment is not possible, has anyone run into this problem before, it's a 64 GTO with front diskbrakes

They make offset control arm shafts to correct this. The shaft pivots are offset to get more adjustment than stock parts allow.

Limk: https://www.summitracing.com/parts/p.../gto/year/1964

The offset shafts are a viable, easier solution.

The issue is that the frame has sagged over the years with the heavy engine weighing down on it. Another more complex solution is to have the frame bent back into its original shape and dimensions at a frame shop. This solution really only makes sense to do if you are doing a full body-off restoration though when you can more easily work with the bare frame.