Reply To: modern pump 1956 10hp

[Don]

I’m confused….Are you saying you used another bypass cover gasket between your aluminum plate and the bypass cover to seal that area? If so, I would follow Mumbles’ advice and just fill in that entire area, then drill the small hole through it lining up with the hole you have already drilled.
Perhaps you can find a 10hp bypass cover from a 60 or newer 10hp that has the fuel pump mounting already cast in place…