Spoke to James Paddock yesterday and he says there are only 2 pumps. One with screw connectors and one with tails. The tail type needs a spacer. I have the one with screw connectors, there’s know way it will fit without a spacer. Trying to fit it with the cam off, it pushes on the lever. With the cam at full lift you can’t bolt the pump back to the block. I removed the studs and bolted the pump on with longer bolts and turned some 1/2” spacers on the lathe. The pump works perfect. I’ve checked the engine number and it’s comes up as early 13/60 which is correct. So no idea what’s the issue.