Tons of video on boop tub on how to split and pull crank
Another reason to pull studs is, there no good and need to be replaced with new ones as well as the nuts. With the head studs removed it is easier to rebuild. If the head as been milled down you must use washers under the head stud nuts to keep them from bottoming out and hold head to torque. look at tab on head the thickness will tell you if and how much of a washer you need. The head surface must be flat as well as the top of the cylinder in order to seal.
If you decide to take short cuts you will learn a lot real quick.
No matter your choice we all can help as you go. Post pics and info. I now my self I had to learn the hard way a few times.
We have all heard the famous " It has new top end on it".
Since its for your wife and you to enjoys I would recommend you take it a part and rebuild and have a good
Engine to enjoy for years. At this point parts are cheap.
Look forward to your rebuild.