Hi guys. Before my VR was mounted to the firewall with some sheet metal screws. I have since ordered some new screws from Classic, however these have rubber and a screw. I am wondering how these go together?

It looks like the VR is not supposed to touch the firewall??

1950 Chevy 3100 Blog w/Pics - http://txchevy50.blogspot.com/
Goal: Clean, Rebuild, Paint, & Drive on a budget. Major restore of components will be done over time.