Ahh... another logical explanation. Someone just forwarded this to me.
This car has the Fisher Body Unit Number 2,220 built in the 4th week of February. This could explain cars before or during the Feb/March time frame not having the tach with Rally Gauges and after Feb/March time frame cars having option 444 that included Rally Gauges & Hood Mounted tach.
A: The Hood Tach first became available sometime in Feb/Mar of '67 on all Pontiac Models. The first style was the "TALL" style which refers to the height of the case. Also, the first style used only a single light bulb and there were variations with the face colors and redlines depending on carline and engine. 1967 Firebird (and very early '68 Firebirds) used the Tall Style. Face background was Black with Green characters while the GTO and Full-Size had Steel Blue Backgrounds with White characters. After supplies of the 'Tall' Style Hood Tach were exhausted, the 2nd style came into production. This was a 'shorter' case (by an inch or so) and now had (2) bulbs instead of the previous (1). This new style was released into production on April 20th 1967 (even though early '68 Firebirds continued using the Tall Style). The face on this first 'short' style was of a circular pattern. On June 29th 1967, this face was changed to an 'oval' pattern. Face background was steel blue with white characters. The final major design change came with the '69 model. The face background was changed to black with white characters. The Hood Tach lasted through '72 production. From '67 - '72, there were many Redline variations for different engines/models including the OHC-6 cars and Ram Air engines. The '67 OHC-6 Firebird had a 6500 redline. This was later changed to 5500. RA II used the OHC-6 5500 redline. All other applications used a 5100 redline. The rarest would be the 'supposed' Hood Tach released for the RAV engine. Back in the 80's, "Purely PMD" from NM built a '69 Judge with a complete RAV engine and found what was described as the only known RAV Hood Tach that had a lights for 'shifting' built into the face.
