Thank you so much for the reply! I've seen some people in videos bolt it directly as I have, and I saw one video where their MSD Pack came with rubber bushings which confused me. I'm glad I don't have to go searching for rubber bushings now!

Our NME3021 MSD coil is bolted directly onto the valve cover without the bushings. 

We have never had any issues reported with the mounting.

Bought a MSD Coil Pack for my R53 and it came with bolts to replace the originals since the OEM bolts are within a sleeve and won't fit into the MSD pack. The only problem is the OEM Coil pack bolts each had two bushings on them, top and bottom and seemed to provide vibration damping for the coil pack itself but the new bolts that came with the MSD aren't long enough to accommodate the bushings. Am I going to run into problems with the MSD if it's bolted directly to the valve cover? (I know not to torque the bolts down too much as to not crack the valve cover)
Is there going to be issues from too much vibration and or heat from sitting directly on the engine? Any help would be greatly appreciated!