Re: '69 Corvette vacuum leak?
The first thing you need to do is to plug the vacuum ports on the intake to see if it's accessory related or motor related. I have worked on hundreds of 69-72 vettes and thats where you should start.
If you determine that it is accessory related you need to hook up a vacuum pump to the manifold to resivoir tank to start to track down your leak.
Hope this helps.
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