oilpan capacity

What I did with mine was , first off I wanted the oil away from the crank some more so I cut off 1" of my dip stick tube so the stick goes down further then I filled it up to the full mark and it took 7.5 qts.
My pan was a custom pan that had a hole for the center link to go through and wasn't as deep as yours. That's a milidon pan you got there.
Here is a picture of the old motor coming out to get a cleaning and new freeze plugs after 10 years in the car.

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Curious as to the reason for the custom pan. I "think" I have an idea that it's due to ground clearance of the standard Miloden deep pan and either cost or width of the Road Race version? I am seriously considering one that looks like yours for my E-body to keep it low profile with the added capacity.