Well guys, thanks for helping out.
The vac is ported blackpearl, it is on the upper portion of the carb.
From your input I understand that a new vac advance control unit is demanded. Is this adequate?:
http://www.ebay.com/itm/Airtex-4V110...7d55e6&vxp=mtr
@joe1950: spark is blue/whitish alright, just seems weak to me.
I'm a bit concerned now to start the car in this condition, improper timing can really harm your engine from what I've read (ignition way before time while the piston is ascending for instance), so I'm afraid to conduct all this testing you proposed.
Do advise on the vac unit above so I can clear this one rapidly.
Regards.