Just a little food for thought.

If you use a solid mount on the driverside and a rubber or poly mount on the passenger it will provide a fairly solid mount. I did it for years.

BUT, (just a thought, open to alternatives) now when the motor vibrates/moves, it is flexing the block at the mounting tabs for the solid mount. Under hard acceleration, couldn't it even pull the #3 cylinder walls slightly out of round? After all a properly done hone job includes using a boring plate to simulate the load of the cylinder head bolt stress.

Seems like most of my motor failures when I ran a solid mount, involved bearing issues at the 3-4 journals.

So I would recommend the poly mounts with the use of a travel limiter (chain, cable, turnbuckle, ect..) connected from the frame to a head or water pump bolt.