MCS = mixture control system

Device box is aluminum colored box on dside inner fender with all the hoses.

Timing to 8*BTDC with vac removed from distributor and plugged, idle at 700-750.

Your prob sounds like stuck choke or bad float adj. or internal fuel leak. May also be bad mixture control solenoid valve in carb, or bad bowl vent valve. which is not in the rebuild kit.

PM me if you have continuing problem.


Not responsible for advice not taken...