First time motor pull

I know there are some first comers here who have experienced their first slant 6 motor pull. I am not looking for an exact time frame, but how long did it take before you were able to get the motor out of the car?

We have a 68 Valiant we need to pull the cracked block motor out of and replace it with one we've built.

On another subject, it seems the tranny is slipping more and more until the motor heats up.
Should we pull both at the same time? Or wait and pull the tranny after we get the motor out?