'73 3.0cs 30 year restoration

[Stevehose]

Yes, the rubber breaks down or the thackery washers loosen (if using those). Or if not installed correctly will leak right away. I've used regular gaskets for 8 years with no issues, and no leaks.

So it is a soft mount, which followed the strong recommendation from Korman. Is the air leak something that happens over time as the rubber breaks down, or something people see immediately?