How much vacuum should my Pantera's engine have at idle?

I have a aggressive solid liter flat tapper cam. Unfortunately don’t know any details. 750 Holley on top of single plane tall ram intake. Set valve lash and idle vacuum is around 7”. Was higher when lash was loose (about 008 too loose). Seems like vacuum is too low but I cannot find any vacuum leaks. Does 7” seem ok?

 Thanks 

David Finley #3659

Last edited by George P
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