I'm not sure what "job" you are talking about.
If you are talking about the pressure testing , adjustment and diagnosis of your modulator/vacuum system; I would guess 2 hours labor. Including changing the modulator if necessary.
BUT, no self-respecting professional will install customer supplied parts. The basic reasons are economic but in my case it has to do with warrantee. There are no repairs that I don't warrantee and I am not interested in negotiating that.
Bosch Master, ASE Master, L1
33 years MB technician