Hi Bob, I'm sure you've seen way more cars than I have, I've seen 2 67's (both had the plastic insert), and 3 68's (all late cars, all had the cast, one piece panels) additionally, I've bought 2 more of the cast one piece panels, both off of 68's (one standard, and one woodgrain, can't imagine a deluxe interior car without a heater
) One thing I've never seen is a 69/70 heater delete car, I'd love to see what ford did for the heater control panel..... Buying/Hoarding rare or NOS 69/70 parts has been an obsession of mine since the 1980's John