youll certainly be able to run 7 quarts, but remember the engine almost never sits level theres almost always an angle in the drive line where the rear of the engines a bit lower where the sump is at the rear being lower by design, but keep in mind 1.5-to-2 quarts are circulating thru the upper engine while its actually running so the sump levels even lower during its operation.
btw look's like you did a really nice job on the oil pan/ windage tray fabrication
Thanks Grumpy!
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