Hi Col,
I have just replaced my engine mounts. I used an approximate 10 x 10 inch off cut board in order to protect the pan. By doing this, the weight of the engine is spread evenly and carried by all 4 walls of the pan.
I raised it in the centre in order to keep the engine level and checked all the pipes, hoses and wiring until the engine mounts were free. The new mountings are 58mm high, if I remember correct. So if you lift slowly until the mounts are loose, you should be OK, and then a little bit more to slip the new ones in.
I then used the same off cut board to lift the auto box under it's pan in order to replace the rear/tranny mount.
Remember to check your hood/engine clearance before closing the hood. If you find that you do not have enough hood clearance, you might also check your front subframe/body mounts. There should be a 4mm spacer, called a 'stop plate', which is very important for hood clearance and body stance. For some reason most of these 'stop plates' have somehow 'disappeared' over the years.
Regards
Chris