So I ordered new carbs that were 'rebuilt and shimmed'. Put them on and they are even worse than the ones I had on before. Wont start now for more than 1 second. I can see a vacuum leak in the cold air but I cant find the source. It looks like it's coming from the carburetor itself and not the boots. I did have it running the night before but it idled at 2k and was jumpy. I'm thinking it's a vacuum leak that's the issue but I'm also guessing it needs to be tuned. The guy said he bench synched it but I'm unsure. It's extremely frustrating, I was assuming I would just bolt it on and adjust the idle knob but no, its even more headaches now. The grounding cable bolt snapped off too so I have to drill that out now. Anyone have any ideas?