[RetroSC]

You mention it seems to run rough even when revved higher? If so, that's not usually how a new vacuum leak presents itself. The problem usually plagues idle the most and eases as the throttle increases. I'm feeling like more of a fuel or ignition problem here.

It's possible the car was not driven much previously so the fuel tank might have a lot of sediment in it. You driving has caused the filter or something else to clog a bit. Cold pressure looked a little low, but check pressures when revved up to make sure they don't drop.