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

Ha did a 6 to 8 man to auto in my 78 ford f100 it was a base truck think all it had was ps ...
Had everything out of a 78 ford granda
Had it running in a day but exhaust took a while...used the floor shifter and rad and trans lines ...couldn't believe that even the drive shaft from the man fit the auto...
I didn't care about anything other then make it run yet everything swapped..all I had to buy was exhaust