Sounds like a typical MMC ‚Äúcomplication‚ÄĚ.
I do wonder at the MMC ability to properly assess the impact of engine changes on ancillary systems.
Is it a case of bung the new engine in and see what happens ?
Morgan owners do seem to be the extended development team too.
Surely a properly designed connection would be straight forward to include in the initial trial fit development stage?
Quality should be built in from the design stage.