As I said I do think you would be wiser to whip the pump off and get it sorted first as last.
Your pump will already be timed to your engine. There will be a mark on the pump flange which lines up with a mark or pointer on the timing case. See red line in the picture below.
If you are refitting the same pump all you have to do is turn the pump to line up the marks. If either mark is missing make your own before disturbing anything so you can return the pump to the same spot, a small sharp chisel is an ideal tool for the job.
The Quill shaft which connects the pump to the pump drive has a master spline on both ends so it's impossible to go wrong when putting the pump back on. There really is nothing complicated about it.
There is a procedure which I have described on here somewhere for timing non original pump to an engine without the special timing tools, but that's another story.
P.S.
If you want to find that post it's headed "TIMING CAV DPA PUMPS" It's near the bottom of the first page when the search comes up.
Fred
) he probably has got cr*p in the tank but the rusty look of the innards could me it has stood for some time with moisture contamination in the fuel.
