Jeff, The pic of that last one "Appears" to have been a bit "Modified"....lol.....
Should go on to say that all of the Rally-Pacs that Jeff has pictured above are all known as "Low Profile" Rally-Pacs which are the "Correct" Style for all 1966 Mustangs, or 1965 Mustangs with the Pony "Deluxe" Interior or "GT" Package. (Basically any Mustang that Correctly came with a 5-Dial Cluster Originally). The Low Profile Rally-Pacs could have been ALL-Black, or Color-Keyed to the Car's Interior Trim (Same color as the Dash and Steering Column).
However, At the same time in 1966, The Ford Dealers still sold the earlier "High Profile" Rally-Pacs "Over the counter" at Ford Service Parts Counters...and could have been installed in just about any car...regardless...by and person or Ford Dealer...though not "technically" correct.... The earlier "High Profile" Rally-Pacs only came in one color....Black.
Believe that only Hi-Po Engine Equipped cars and GT cars got the 8,000RPM Tachs, and All other cars got 6,000RPM Tachs. I'm not 100% sure if ALL GT cars got 8,000RPM tachs or if it was just Hi-Po engined cars. It may have just been the Hi-Po cars... I'd have to look it up...or Jeff will reply..
)
Tony K.