1966 L72 Biscayne

[LT1vette]

Seems to be a lot of "ideas" bouncing around here on the options...re tach and the tranny.

Tach was available as an "option", could be ordered, did not have to come ONLY with the BB engine, it could be ordered with a 327 too. But finding a car with a in dash tach would be 90% chance it was a BB. So to find a BB car without a factory tach would make me wonder. The tachs work very well, as well as any aftermarket available at the time. But they were hard to see in the right side pod in the dash, hence the tachs on the steering column were prevalent for serious drag cars.

Almost ALL cars that were ordered with a four speed got the M21, (95%+) very few came with a M20.

Also a very high percentage came with the 12 bolt rear end, very hard to find a 10 bolt rear end for parts. Even 6 cylinder cars came with the 12 bolt.