Steve-
Is the Dom bowl a different diameter than a berk?
My Dom T/A is angled, 2.5" at the top, 5.5" at the bottom, and pump is as far back without breaching the transom/keel area. Clean-out is 'just' under the transom. I guess it would be too shallow for your setback?
I do have a standard Berk T/A, not in use.
Dan'l