Depending on year and carburetor model there are three or four things that are easy to fiddle with that change how it runs.
Yes, it's the Holley 1940. You can get them from Champion Carburetor.
Adjust carb on 400 Polaris 4x4 2stroke
350 cu in with 2 barrel carb, 8 degrees at 1100 rpms 350 cu in with 4 barrel carb and standard transmission, 8 degress at 1100 rpms 350 cu in with 4 barrel carb and automatic transmission, 12 degrees at 1100 rpms
The distributor on the 1100 Mini cooper is in the same spot as the rest of the A series motors. The forward side of the motor right in the middle.
"84 is still the carb. There is a small screw right at the throttle cable on the carb. Adjust that.
there is a screw on the carb. be sure to adjust while the engine is running so you can tell by the idle when it is set properly.
there is a set screw on the linkage on the carb that will adjust it.
Yes, all real mini's are front wheel drive
it's the screw right above the mounting bolt on the left rear of the carb. you'll have to adjust the idle screw as well as you lean it out. then check your timing again
Adjust the throttle stop screw located on the side of the carb that has your throttle linkage connected to it.
adjustment screw is between throttlre linkage and carb body on the right side of the carb as you stand at the front of the car looking at the carb
twist the screw under the carb