2.0L D-Jetronic Distributors, Differences Options

[pbanders]

I'm putting together some materials on 914 D-Jetronic distributors I hope to add to my web page soon (along with other updates). I have some questions regarding the 2.0L distributors.

Sources list the following distributors were used for the 2.0L across the model years:

1973: 039 905 205 (vac canister 022 905 271 C)
1974: 039 905 205A (vac canister 022 905 271)
1975-1976: 039 905 205B (vac canister 022 905 271)

I have data for the mechanical advance curve for the 205 and 205A distributors, but not for the 205B distributor. Does anyone have a source for this information? I'm looking for the advance at 1500 and 3000 rpm. I have data for the vacuum advance and retard cells for both the 271 and 271 C canisters.

Another question is the use of vacuum advance on various years of the 2.0L engines. IIRC, the vacuum advance was not connected on the 1975 and 1976 engines. There was a hose that came off of the throttle body (the port was still there), but it was capped and not connected to the vacuum advance cell of the distributor. Is this correct? Was it also disconnected on the 1974 2.0L engine?

Thanks in advance for any help on these questions.