273 Commando Valve Covers

Here's another piece of trivia. You'll notice on 3 of the 4 covers' aluminum fins in Leanna's pics, there's a slot between the 2 plug wire-holder areas. Those are '67 fins, and use the 1-piece, 2-place plastic plug wire insulators, being they have a retaining tab that slides into that slot (2nd pic below). The fins without that slot are '65/'66, and they use the round,individual plastic plug wire insulators (1st pic below).