Mike, do you have a picture of that finished product.
No, I never got a pic of it.
...ok, I just spoke to Marlin about it. He uses a 22R main bearing bolt with a steel washer and a nylon washer to help absorb the vibrations. Then he drills from the center of the mount half way from each side, less you drill a sideways hole. Then he runs the bolt from the bottom of the mount to the top. The frame bracket has a 1" hole in the center where the head of the bolt will live. Then when you lower the engine back on the mount, you will have the bolt's threads protruding through the engine mount bracket just like it did from the factory.
So at first glance it will look completely like a stock mount, unless you examine beneath it.
BigMike