I think I see what you're saying, but it seems to me that the easiest thing to do is to wire the pressure switch into the fuel pump power lead coming off the relay and a bypass (or shorting) switch across the pressure switch leads.

But in all likelhood, the bypass switch wouldn't be needed unless extended cranking was necessary for starting.... because there's enough fuel in the bowl to run the engine until oil pressure closes the pressure switch.

Frank

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