Hey Everyone

I just picked up a Petty Blue 72 Duster 340, a real H code car and it has drum brakes on the front. I was always under the impression that 340 cars came with disks up front as standard is this true ?

What would it take to swap it over to disk up front, do i need to find an A-body disk brake set up or would something else work like an F-body or M-body set up ?

Thanks
Jay

They had 10 inch drums stock, and IIRC, you'll need upper arms too to swap to later A discs

Disc brakes were standard on 1970 340 Dusters, but became optional in later years

Thanks for the replys.

What would i need to convert to disk up front and what year/ model would work well on it ?

Thanks
Jay

The '73 and up a body upper control arms take the bigger ball joint size neccesary to run a '73 up a body disc knuckle. You can also use other body style knuckles but some people feel it could cause bump steer issues. If you do go with the 73 up style discs be ready to switch to 5 on 4.5" bolt pattern wheels. You will also need a new m/c and proportioning valve. I went with an adjustable- the stock setup is known to lock up the back first which you don't want.

You can keep your small bolt pattern and small balljoint upper control arms with a Kelsey Hayes four piston caliper setup. It came stock before 73 but it can be tempermental- the pads tend to wear grooves making them not slide properly on their shafts. Also even though the parts are very similar to a 60s mustang setup they are rare and expensive.

On my '73 dart I went with big bolt pattern stock stuff (had to change ucas) and it works great. I changed the rear axle to match the bolt pattern. On my '72 h code demon I went with 1990 chevy celebrity brakes with a scarebird adaptor to mount the calipers. Kept my 5 on 4" rallys.

Good luck.