Just bolts in, if you ahver teh right tools, and haven't done it before allow a day to get the engine ut, esp wiht seized parts, and another day to put it back in, and then anohter day or so for any problems.
If you've done it all before then a day should be all you need
Might be worth overhauling the valver engine before you drop it in, check shells etc, and change stuff like water pump and crank oil seals etc, just alot easier to do wiht engine out