Here is what you are looking for :

At idle, 3.2-3.6 Bar [ bar =14.5psi]

W/vac line to reg disconnected , it should rise to 3.7-4.2

It should hold for 30 min after turned off to no less than 2.5 bar

Volume should be 1 liter in <35 sec.

I would imagine your guy has already done a FP test, but you may want to ask...