Best Place to Buy Motor Mounts For my 383 Formula S.
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Passenger side is in compression. Factory mount rarely fails if the driver side mount is controlled. This is why I said to through bolt the driver side. Drill the top plate just behind the outer stud all the way through the original mount. There will be enough room for the bolt to slip through the outer slot in the k-frame. Put a washer and nylock nut on it and tighten just enough to keep the driver side mount from pulling apart. If done right it will flex a tad so it does not feel like a solid mount but not enough to roll the engine over hard on the passenger side.
This is only good for a factory BB k-frame and mount.