I tilted my 73 Grabber today, was pretty easy, way easier than I thought. Seems to be pretty stable, I even moved the car around a bit while it was up on it's side.
I did it all by myself (everyon else was too scared), with the help of my engine hoist The seal seems to be holding, the rearend will come out once I finish painting the bottom, so it doesn't matter if it leaks (the brakes need to be done anyways)