A Body swap with E body 8 3/4 with 4link

Demonic said
It's about 5.1" wider at the flange dimension, so a little over 2.5" per side. You'd end up with heavily positive offset wheels looking gross, resembling a front wheel drive. A 66-70 B body rear housing is a much better fit at an 1.5" less, and a perch difference of only 1". Still requires welding in either case.

A nice Ridgid pipe cutter, a square and a welder are your friend.

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Oh, by the way, welcome to the forum. Show us some pics of that V6 Dart, I know I'd like to see it.

:lol:

In the “66-70” range you posted there are 2 different B body widths, ‘65-67 is narrower than ‘68-70. Your source of info is wrong.

Demonic said
View attachment 1715565625

I believe the A dimension is the bare housing flange, with the backing plates removed.

There it is, misinformation central. This chart is FULL of errors. It’s a terrible chart that has been pointed out as being wrong dozens and dozens of times. Please stop reposting this garbage.

The information you need is here

An accurate 8 3/4" rear axle width list

Professor Fate said
Truck rear. Perches on top. 12" brakes. Find an A or B Body rear, much easier.
(V6??)

Yeah, it’s a truck or van 8 3/4. An A100 8 3/4 is almost the same dimensions as an E body, might be one of those.

Either way, too wide to work in a Dart without shortening and moving the perches.

But a truck/van rear axle can be narrowed, if you send the axles out they can be shortened to whatever spec you like. Or DoctorDiff sells new axles for a pretty reasonable price. If you have access to a welder, or know someone that does, you can probably work with the axle you have and still spend a lot less money than buying an A-body 8 3/4, prices on those things are ridiculous.

And if the brakes are the 5x4.5” bolt pattern those are probably 11x2.5”
brakes, they outside diameter would be 12” but that’s not how they’re identified.