Thanks for the response on mercury switches...found one by calling manufacturer out of Indiana, American Electronics Compnents/Durakool. Call 574-264-1116 and they will hook you up with a distributor nearest to you. Radio Shack, good idea, will check them out. Mcmaster had the same item I ordered from Durakool, but for substantially more money.
By the way, does anyone have any parts for Smithway L-1 pump...need metal pieces that go aound window glass to enclose calculator face. Wishfull thinking, I know.
Also, Jack I'll take a copy of your new book when published!! I am not much of a collector but I find these books on all auto related subjects great fun. Just great stuff.