Thanks Brad,

Just FYI, after I posted it here I found a place called wiperman.com.

Here was his reply.

This pump is mainly found on postwar cars to roughly 1951. Very universal, vacuum in the top, water out the side. I have a dash switch for (aftermarket Trico of the time frame). NOS $35, plus postage. Just has vacuum in and out when button is pressed. Search ebay for washer kits, sellers like caddycoop often show the instruction sheets in the auction pictures. Rob

"As I lay rubber down the street, I pray for traction I can keep, but if I spin and begin to slide, please dear God protect my sweet ride." -Amen

56 Chevy 3100