hello can anybody tell me what the stock measurement on a 1969 cutlass front backing plate to backing plate

 

I've got a 1969 and also a loose 1969 door. But I'm not clear on what measurement your needing. Would you post a little more info?

John

 

Welcome. What exactly are you trying to do? This is an unusual request, as the dimension is fixed by the spindles and control arms. Are you thinking about swapping a different front suspension (like a C4 Corvette)?