[Xplantdad]

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Can anyone give me a legitimate answer to this power brakes question?


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Hey Supercar Kid...This is Tim's response:

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I may have this one wrong, but as I recall, Chevrolet Division had the "lead" in developing disc brakes so they would have had 1st shot at usage.
In those days, GM had what was called an "Orange Book" that outlined which Car Division had "design responsibility" for given components. Possibly someone in your forum has a copy of this document - - it would be very interesting to read it now.

The disc brake and wheel width transitions in 1969/1970 were confusing.
Option proliferation was driving the plants crazy and the performance era was adding significant end items to final assembly. There was also the "low advertised price" culture at the time. Muscle cars were competing for baby boomers' first pay checks - - even common sense options were not made standard (like brake/wheel upgrades, gage packages, power steering, "heater cars," and steering wheels).

One other thought, but only speculation. Often there were capacity constraints, especially with emerging new options(idling drum brake capacity and bringing-up disc brake capacity without losing total capacity). Even UAW got involved with different plants going down/up in employees. The Division GMs fought for the scarce options and the deciding vote was usually based on a volume consideration - - they did not want to over-extend applications so they would have sufficient supply for what they called "free expression" demand for any given application.

Terrific clip of your car. I like the front-end lift when you launched.

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