[GTA Alfa]

As @1750GT mentions, keep some oil in the the logic section, and rotate the pulley occasionally with some sea foam spray. As long as you keep it high and dry it will be fine. I have used pumps stored this way and have never had an issue, when put in use.

 

[GTA Alfa]

Put it back to Spica! If you are planning to re-use the pump off the shelf it will depend on how it was pickled. What condition was it in when you removed it back in 1979? How much mileage is on it? I find that Spica pumps are very robust. However, it would at least require a complete bench check with a barrel and plunger leakage test. If its determined to be a leaker, it should be sent off for rebuilding. If the Spica system is set up correctly, you will not experience any driveablitity issues vs. Webers.