Block you motor up or at least a big block between the frame and the motor.
I write with both hands because the 350 chebby I was changing mounts on
had a nice 2x4 between the motor and the frame with the jack I was using
popped a seal.

IT DOES HAPPEN !! Its noo biggie IF you are prepared for it. The jack was
about a year and a half old.

__________________
1985 300D 198K sold
1982 300D 202K
1989 300E 125K
1992 940T

"If you dont have time to do it safely, you dont have time to do it"

"The democracy will cease to exist when you take away from those who are willing to work and give to those who would not."