The valve covers with 4 bolts around the edge won't need grommets, as there shouldn't be any holes in the center for the rocker arm studs.

Like Carl said, with the 4 bolt valve covers you need to flatten out the area around the bolt holes. I can almost guarantee that they'll be dished.

Kevin
1951 Chevy 3100 work truck
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1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car)
Busting rust since the mid-60's
If you're smart enough to take it apart, you darn well better be smart enough to put it back together.