Quote:
Originally Posted by 406 Q-ship
Not in cars........GM put disc brakes on the option list when the 375 HP/396 Ci and the 425 HP/ 427 CI was king, the trucks may have not gotten them until 71 but then none of the other manufactures were putting disc brakes on a truck until after 1971. In fact on SS Chevelles after 1969 Disc Brakes were a required option, so GM knew that they were much better than drums.
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1970 beginning of new smog regulations for car manufacturers.