I put a new dual pump on my truck, a few years ago. I had trouble with the pump leaking gas and oil. A replacement unit did the same thing and I gave up. I think the name was something like "Airtex". Another point of interest was that the spring tension on the actuator arm was much greater then the ordinary pump. It was so high that the only way I could move it was to hold the pump and push the arm against my work bench. I didn't actually like the idea of that much tension on the cam lobe.
