I can't measure. So I do it the dummy way.
Put 4 screws that fill the engine mounting holes and that stick out the back of the holes by about a 1/2". Put 4 nuts on snug, make sure at least 3 or 4 threads are showing.
Press hand pressure hard. No good dents ? 2 people and a piece of carbon paper.


Puttin a point on the screw makes it 1 person again. Your choice.