The dash pictured above came from a original 1 owner 67 car with the same tachometer as pictured . The reason for the new tach was the original didn't work and couldn't be repaired with an upgrade for use with MSD ignition system. The aftermarket was the cheapest way to go. Note the 150 speedo.
I have owned many a-bodies with rally tachs. The tach always matched the speedo. Here is a tack out of a late 69 or 70 out of the dash the one in the dash is a 71. I have seen both styles in 69's radial and upright numbers. But the tachs always matched the speedo. I never saw and in dash tach in a 120 speedo car though. They were always 150 speedos. except for the Darts with console mounted tach. The darts were always 120.
I have had cars with 120 radial speedos installed in 71 cars as replacements but they were not factory. Seen and owned many cars with tachs. They always would match the speedo if original . 69 came with either depending on the production date. But always with a 150 speedo in the cars I have owned. 120's usually had the performance gauge, And the clocks? I have only had one clock that was in a 68 barracuda 318 car 120 speedo.
