I did a job for a buddy years ago. it was a box \truck think it was a Volvo engine if I remember right. there were o-rings on the cylinders. I fabricated a jig with all thread to both pull the old cylinders and press in the new ones. Only had to redo one cylinder. felt lucky.

I know a lot about a lot of things BUT I still have a lot to learn.
Life is what you make of it. So, why not make a working machine to make it easier.