Does anyone have a 13b carby setup. I just need to know the setting of the ignition distributor. Because mine is turned all the way to the left, I think thats strange because my 12a is in the middle.

If I could get a picture that would be a better demo.

 

i'd use a timing light and see where the timing is set at. ur 12a may be set to the factory setting and the 13b may be turned to where it would run because it wasn't put in in the right position.

 

Your dizzy might be 1 tooth off on the gear or something when it was installed. I have that problem, but I can't get my dizzy out, so I can't fix it. But timing is right so I'm not worried about it.