It was just a thought to put a t-piece in the vac line going from car to diaphragm to measure vacuum. Honestly I haven't checked anything was just looking at the carby and was trying to figure out how it worked. I was thinking about putting a weber on, but being auto I think it will be wasted money. I will stop the secondaries from opening and see how it feels on the road, I'm interested to see how much it does