Are you insinuating that slotting the holes in the base plate at an angle will not work? I was thinking of how the blp and qft base plates that fit both 4150 and 4500 are. You could humor me with some measurements off of that intake LOL
There are 2 size BBD's, the larger one looks nothing like the 'teener one, it has the same pattern as the Holley 2210/2245. The bolt pattern is unique to them.