Doug,
As Ii said, sounds like it might be a earlier crankshaft. If so, the main worry is it might lack the grooves to introduce oil to the rod bearings from the spray bar, as seen here:
The theory of the use of a double-row, self-aligning bearing is Douglas did not trust their bearing bore alignment and it prevented crankshaft whip from stressing the drive side crankcase and cracking around the bearing boss. The later has happen on the more powerful engines, like the DT. The common practice now is to use a double row spherical self-aligning roller bearing. I don't know if there a a lot of folk out there that have upgraded to a cylindrical roller bearing.
The spray bars that I have seen have been threaded into the pump body. They have a thin jam nut to lock them in the proper orientation. Like seen here:
Not sure why the crankcase bolts would be bent due to the crankshaft/rods. Does the K/M32 retain the practice of the 350EW and A31 of using eye bolts anchored on the crankcase bolts to serve as cylinder base studs? If so, I an not surprised as that was not one of their better weight/cost saving practices!
Some engineering data for the DT engines survive where the crankcase gasket allowance can be calculated as 0.006". I have some NOS gasket sets for the Aero models where the paper for the crankcase joints is also 0.006". I don't who the supplier or brand is, but six thou of an inch seems to have been the original intention.
The cylinder base gaskets in the same set is slightly thicker at 0.008" thick for the 250/350cc models. But in the 500/600cc sets they are twice that thickness. Both are some sort of branded gasket material, though not enough of the text is visible to read it. The timing cover and oil pump gaskets are just plain looking brown paper, and those are fairly thick at eighteen to twenty thou.
I would expect the K/M32 to use the same cylinder head gasket as the detachable head EW or the A31. The parts list for those just call it a joint washer, without saying if it is solid copper of a copper sheet and composite sandwich. Given that it is just a narrow ring, probably solid. In any event I imagine solid copper would work fine.
-Doug