STP: again, many thanks for your reply---
I think one of our difficulties here is that, as Winnie said, we're separated by a common language...
"Continental engine" is probably incorrect; "Continental-built" is probably closer, and I would assume Dodge designed, Cont'l being simply the fabricator, as ir appears Cont'l didn't offer this engine to anyone else. I say appears as I have not made a comprehensive search thru my own limited sources, and I doubt a complete search is possible, given that no authoritative list of everyone Cont'l dealt with is available...
I said above I had one catalog listing; actually, I have two:
1930 Mann Precision Piston Pins catalog lists
1928-29 Sen 6, Victory 6,Std. 6---Comt 6 33/8 bore
1927 Senior 6---Cont Spec 6 31/4 bore... (Exact quotes)...
The May 1938 Victor Gasket catalog lists:
Dodge Bros. (Passenger---6 Cyl. 1927-28. Senior 6.31/4x41/2; 1929-30. 33/8x41/2. (Continental 12M) (Also included are various truck and bus models1927-31). (Exact quote) Hd gskt #668, page 105
The Continental engine section of that catalog has a short index of Cont'ls listed under individual makes, and includes
"AD. (Dodge Senior"; the gasket and page # are for the Dodge Bros listing above, AND
"12M-14M (Dodge)", again giving gasket and page # for the Dodge Bros listing above.
I would've sent pix but since my last meltdown my set only transmits in GB instead of KB...
The seven main item I assume was either a misprint or a runaway publicist...
I don't really have a horse in this race; I got involved per other Cont'l engine comments. For me it was just academic (aka idle) curiosity. For authoritative info on this, the AU Dodge/CCptn/Mopar clubs should be consulted.
And, my apologies if I've destrioed any illusions...