Because of the vibrations experienced at the engine mounts, you will need to drill through the plate, and install a bolt long enough to double nut, and still allow a small amount of movement. You need grade 8 bolt/s and grade 8 nuts at the minimum. I tried it using a single bolt and nut, and on the first run, the nut backed completely off. I then drilled the bracket and mount for two bolts, and solved the problem. The bolt should come in from the top, and install the double nuts on the bottom. Joe-JDC