narrowing a b-body rear
What a waste of time/effort/AND MONEY!!! :banghead:
Cut the Perches off...weld them BACK on = A-Body Frame Width Specs...with the correct pinion angle.....and install that B-Rear in that A !!! Then Enjoy!
Absolutely this.
With a 65-67 B rear I would just move the perches. While I was at it I would move them to 42" C-C and use one of Dr. Diff's 1/2 offset kits. With the offset kit you can run a 9" rim and 275's for tires.
As far as wheel options, you'll have plenty. In fact, you'll probably have even MORE options, especially with 17 and 18" rims, since most of the newer wheels have more backspacing. Even with 15" aftermarket rims you won't have any problems. The only place you may have to do a little work is stock wheels, but even then there should be some available with what you need.
Stock 70-74 Darts are pretty close to needing zero offset wheels, ie, 8" wide rims with 4.5" backspace, 9" wide rims with 5" backspace. The 65-67 rear would only move that about 3/4" per side. With a 1/2 offset spring offset, that would mean that a 9" wide rim with 6" backspace would be perfect. And there are plenty of options in that size.
Plus, if the axles taper after the splines it means they can't be shortened. Most B body axles can't be cut down and resplined because of that taper. C body and truck axles are the best candidates for that.
