Whatever you do, don't toss the pump. Rebuild it with a new diaphram from
http://www.then-now-auto.com/fuel-pump-repair-kits/
I have pictures that I can upload at a later time. At this point, rebuilding your pump is your only option. I bought two kits a couple years ago, I think they were about $60 each. You will need to drill a 1/16" hole in the side of the pump to allow the use of a punch to drive the pivot pin out from the housing. Again, I have pictures, but I will have to upload them later. Ethanol sucks, I bet you will have a ton of corrosion around your check valves when you open it up.
My advice is to soak your diaphragm screws with penetrant thoroughly before trying to remove them. In the event that you strip the threads out, don't worry, replace them with longer stainless screws and nylon lock nuts. Don't worry, all is not lost.
