I don't have the rule book handy, but the "no late models" rule is in the professional Pro Mod series (IHRA, ADRL, and whatever the NHRA-affiliated series is called this year). I don't recall a model year rule in Comp Eliminator.
That said, I believe Jay is running a 68 Camaro this year, but he's in California and I am in Florida (so is Dave Connolly).