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Shims on the block to pump mounting face are for gear engagement, not time. What I would do is check gear engagement with the grease paint used to set pinion-ring gear alignment and look for residual grease paint in the valleys and crests of the gears. Just bolt the pump up and turn over by...

With bent pushrods, valve lash is way off. Pull the valve covers and compare. Besides, you have to pull each pushrods to swap the camshaft. That and the tappets. Just roll them on a flat plate.

The cam change shouldn't require timing adjustment since it is precision machined. But if th old cam was worn significantly and a new pump timed to it, then you might have an issue with a new cam. It would cause timing to be advanced. I would put a dial indicator on the injection pump pad...