273 Mopar Hi-Po valve covers

the stacks make it pre 66 the heat shield for the alternator wires makes it 66.
To be entirely correct, the 2 "stacks" are for '65 or '66 ones, and that combined with the large bracket makes them '66 vintage covers. Those fins are also correct for '65/'66...the '67 ones had a little slot between the 2 cutouts for the new-for-'67 wire holders.