I use the Motorsport aluminum ones. Those plastic colored valve covers look a little corny in my opinion.
To make the stock ones work you would have to install them and let the car run tapping away, then take them off and look for the shiny spots where they were hitting.
Kinda crude though.
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1988 Mustang GT
11.8 @ 123 (7/14/01)
1992 BadAzz Wrangler
1993 Explorer
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