Yep, I blew it with the numbers, putting the same number in twice.

Datsun Comp must have it wrong also... As listed in the catalog:

9/6-H1050 B210 competition oil pan

9/6-H1052 1200/210 6 quart competition oil pan

The price list is of no help as only has "OIL PAN" as the comment for both part numbers.

I was not aware that there were shape differences between the early and later A-Series pans other than the rod clearance detail. The warmed up A-15 I built many years ago proved the point of rod clearance quite concisely. With the 1200 pan in place I found that the rods hit the side of the pan when I tried to rotate the crank by hand. Fortunately the engine was still on the stand...