I used 1 1/2" yellow pine dimensional lumber routered just like you would have the 3/4". 2x8's The edge boards on both sides are routered 3/4" deeper. I stained mine a light gray. You can bevel the tailgate ends if you want.
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Last edited by 42465967; 12/28/2021 1:15 PM. Reason: words

1959 GMC 100 Fleet
Follow in the DITY