Yeah, the US versions had some changes..
The earlier system requires the vac line to go to the tap right behind the throttle plate at the front of the intake and go directly to the vac retard.
I would then get the servo from a 230/250 dist that has no emmisions. According to the advance curve charts I have , that should do it.
The one you have calls for ATDC, but they run best at TDC /2 BTDC
at idle with the retard and 30/32 at full advance.
You can get the 2 BTDC with vac by shortening the rod on the vac servo. But always set the 30 advance w/o vac first and then do the idle with full closed throttle plate [ at the full stop].
The idle rpm is then set with the air bleed screw at the end of the air hose in FRONT of the throttle plate. That is how they get air for idle with the throttle plate fully closed.
If it is an auto . 750-/800 rpm is good, but sticks like to run up in the 850/900 range.
The older system will give you instant off idle advance and it is quite noticable.....