Hmmm, not sure if it will work after all. The Mark has a two port regulator, right? So fuel enters one port and leaves the other with the regulator acting as a valve between the two. Right? If so this adapter would have to be machined a bit more than I care to as it may have only one port. The main purpose of the design was to add a Schrader valve. Since there is normally just a sensor in place, it only has one port for fuel.
Crap. The pic of the one you posted Mad1stGen may no longer be available then.