Supply Line, the magazine of the MVPA, has an article in it this month about Deuce fuel pumps. The original pumps were made by Tokeim. Says the "minimum flow of 20 GPH at a max restriction of 6.5 PSIG and a max flow of 220 GPH at a minimum restriction of 2.5 PSIG". The design life was 4000 hrs. Also says the company that now owns the manufacturing rights to the pump will sell them direct to the public. Contact Olympic Controls at 847-742-3566, you can pay with a CC...The article has some good pics and talks about reasons the pumps fail.