If you're dilligent about it you can have the engine out in a day, cleaned and rebuilt in same (providing there aren't any signs of severe damage or need for machining) .. and back in the car in about a day as well. Figure if you dont have other distractions and can devote solid time to it.. likely 3 days, 4 tops. .. also providing you have all the tools you'll need at your disposal (air tools likely helping quite a bit with speed) .. speaking of.. I didn't ask about that before, what do your tool resources look like?
Mind you, this is taking time and being careful. A seasoned pro will have an engine out, torn down, rebuilt and back in the car well inside of a weekend including breaks for meals and naps. lol