1952-53 ribbed oil pan setback

I am work on a 8BA. I am thinking of using a 1952-1953 ribbed center sump oil pan. I believe it has a little more setback, I hope on the front. Does anyone know how much of a setback it has compared to a 1949-51 smooth sided center sump pan? Thanks
 
I was hoping you would answer. 1951 ford truck, a little more clearance around mustang front axle would help. How much would I gain? Do you have one? thanks
 
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