31 slant chassis differences

[Sunny the Model A]

Evening y'all, got a strange one for you. I heard that the slant window fordors had different mounting holes than other A frames and that one can only put a slant body on a frame from another slant unless one drills the frame. Is this the case or was I told wrong? Since the slant is such a radical change from the standard fordor body that preceded it, it would not surprise me if it is so. Let me know if the info I have is correct or not, and if it's just holes in the frame that need redrilling, is there a diagram that shows where they need to go? I may have found a slant body and I know of a good 31 chassis that came from a coupe, can they be married together, or is it a match made in you-know-where
? thanks for any info y'all can come up with.