Whats needed

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500 DUSTER

500 DUSTER

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Joined
Feb 11, 2013
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Location
Decaturville, Tn
I have a 1970 dart with small bolt disc brakes what all will I need to swap to the big bolt pattern disc
 
  • Upper control arm from a 73 or later A-body. Drum or disk brake car can be a donor.
  • Disk brake spindle & accoutrements from a 73 or later A-body. Supposedly the same from a 69-71 B-body will work but it changes the suspension geometry a little. I may have B-body years wrong. Other readers, feel free to correct.
  • Disk brake master cylinder, junction block/proportioning valve (can be 1 piece or 2.) front brake hoses.
At the risk of being guilty of stating the obvious, this will leave you with a 4½-inch pattern on the front and a 4-inch on the rear. The simplest solution is a rear axle from a 73 and later disk brake A-body. These will be either 7¼ and 8¼-inch units. The drum brake A-bodies all used the smaller pattern. There are several other solutions out there, but I'd be going beyond the scope of the question to even attempt to provide a list.
 
I appreciate the info didn't know if my current spindle would work or not since it was a disc instead of drum. As for the rear bolt pattern its already been solved with a dana 60
 
Don't discard your SBP disk setup. Those are valuable and treasured. I might even be interested, but shipping from TN isn't cheap.
 
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