Project 440DD

ended up picking up a D60 from an early 70s dodge pickup. 4.10 gears. Going to have it cut down and stronger yet axles put in. now to decide what to cut it down too
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If you're going to run stock wheels on it I recommend 51 1/2 in. That's flange to flange on the housing.
I built mine with 52 and 5/8 to go under a Duster or Dart. But remenber using the wider brakes eats up an inch.