Hi, the front disc brake were standard on 70 Duster 340, but in 71 they put drum brake standard on front.. Yes it's been drag raced but never tubed. The only info I have is that the car was registered from 86 to 87 in Alberta, never registered until I buy it and register in Québec. The car was in Sylvan Lake in 1998 when the guy that sell it to me buy it.