I have searched the archives and it seems this can be done as follows but I’d just like opinions on the safety of this approach.
Put the car up on 4 jackstands
Remove motor mount upper nuts from below
Raise engine by means of floorjack and wooden block pushing up in front part of sump
Hold engine up with engine support bar across the top of the engine compartment
Remove and replace old mounts from below
Fasten upper mount retaining nuts
Lower car to floor and go test drive
I think that minimizes risks. Any advice?