As long as the car can start, hold an idle, doesn't pump out smoke, then yes, you can.
I passed last year in a Familia and that was running and idling like shit and they didn't say anything... as long as it doesn't backfire or stall... and it has to hold up on the 4000rpm rev + handbrake test!
Goodluck!!
Edit: Wait... Regency inspection at 6:30pm?!