Something that may be a problem (which has been worked around): the DCOE has many adjustable or replaceable circuits and internal parts but IIRC it does not have a power valve, metering rod, or other high vacuum lean circuit.
This means that your transition must be borderline rich (just enough) or the gas mileage will be bad.
This hasn't been done TIKO, but a small air solenoid and a Hobbs vacuum switch could add air only when throttle position is 10% or more, and vacuum is 10" or more (examples only!). Opens a hose ending inside the air filter, branches to a 1/8-27 NPT fitting in each manifold runner. Insert a restrictor in the main line to regulate how much air to get 15 or 16:1 on cruise, etc.
