My fuel pump is leaking. I don't know what brand it is, but it does not have the primer lever. I'm assuming since my pump does not have a lever it must be an off-brand and the rebuild kits won't fit. Is that true? I see fuel pumps from the big 3 priced from 50 to 150 bucks. Is there really that much of a difference in quality? Walt Philipson '74 Carmine