What is your fastest time to pull an engine, install another and drive it away?

While the engine is in now, there are some small details to tend to. I need to get the right grommets to allow for a PCV and breather. I need a thermostat and the tailpipes are due in tomorrow. I'm thinking of ditching the points ignition too. I have several underhood wire harnesses I can use to install a stock electronic ignition setup.