Are All /6 distributors the same ?

Yeah, I have one I can barely fit on at all, and another that fits so loose I don't trust it. The one I have on there now is an Accel. Not saying I recommend the Accel necessarily, but it did fit. Better luck going with the "better" brands, but even that's not a guarantee.

I know how you feel to finally get it running right. I slapped a new carb on my /6 this morning and it's like a new car. I'm a valve adjustment away from having it running like a sewing machine now. Sometimes it's just that ONE thing that makes all the difference!