Quick update:

Pulled the line and there was very very little run out. I pulled the pump and it was extremely easy to pull out of the block. It looks like I used the stock o-ring on the snout, so I used a larger o-ring and made a full gasket to go between the block and pump. I primed it and will try turning it over with the starter tomorrow. If no go, then I will put a Baldwin filter on and it try again. I will likely go ahead and get the check valve.

Thanks for all the help.