Vacuum this low normal?

Hey guys. My 340 with a lunati cam 60405 is producing low vacuum like my old garbage thumper cam. I'm just curious if it is normal to get this low of vacuum.
In gear at idle ( around 900 rpm) I'm pulling 4.5-5" of vac.
Details of engine ect. Are:
Eddy heads.
Holley 750 street hp
Air gap.
3800 stall
Manual breaks.
No vacuum advance.

I've checked for a vacuum leak but haven't found anything.

Specs on camshaft