I bought a challenger with a weird shackle issue, the shackles have been moved inboard to the frame with one long bolt. Not safe.

Turns out the reason is because I have a B body rear housing in the car. So the spring seats in one inch per side is the cause.

Could I keep the B body rear and use the mopar E-body offset front hangers and rear shackles??

i think dr diff makes hangars and shackles for just that purpose.

Nope!
You got two options...use "a" body springs or super stocks with the matching offset front and bent rear shackles,
OR get the hangers/shackles for this application(still using your springs) from Doctor Diff.
It is kind of a neat setup, I use it on two of my four challs, you can run a 10" rim and a 275/60/15 inside the wells easily.
No cause for alarm.If you really don't wanna go that route, dig up a stock width Chall housing and axles(8&3/4 I assume)and put your brakes/carrier/u bolts on and scrounge up or buy the stock Chall hangers/shackles.
My .02

I didn't realize that the Mopar offset stuff was for SS springs.

Whats the benefit of running the B body rear?? I suppose you get to move your springs in 1" per side without welding but then you have to run a wheel with an offset.

I'm trying to decide if I should get Cass's parts and keep my axle or just find an ebody rear.

(Wish I didn't give the last one I had away for free).

I used the A body offset hangers for the front as well. The ones for the B-E bodies are for the S/S springs so they are longer (shorter front spring section on the S/S springs) I made and moved in my rear frame rails to make them parallel to help with roll induced oversteer (toe change) But I have heard great things about Dr-Diff's rear offset shackles. My vote is do NOT get rid of the B-body rear and just enjoy some 295/50 15's under there.
Curt
Besides most thing's E-body are overpriced...

Curt gave the third and cheapest option....Buy the A-body offset hangers and the offset shackles....that will allow you to run a B-body rear in a E-body with E-body springs. Thats what I ran for awhile.

Call-Doctor Diff...he make's his own kit and can set you up with everything you need as well.

I see, the Mopar E-body offsets are for SS springs but the Mopar A body offset hangers are essentially stock spring E-body offset hangers also?

I happened to already buy the Mopar E-body offset hangers and the offset rear shackles thinking I could fix it without really knowing the full story. Didn't realize they are for SS springs.

I'm guessing I cant just redrill the offset E hangers to work with the longer front segment because of a funky bend??

Anybody have Cass's contact info? His PM box is full.

Perhaps if you've come this far, you are willing to come a little further....Get Cass's kit, some Caltracs with their split monoleafs, and a FirmFeel rear swaybar and you'll be happy indead!

Why can't you just drill another hole further back on the Mopar offset hangers to allow the use of stock springs?

What are people running out back with the B-body rear??

I'd like to go with a 10" wide rim but what backspace do I need??

I am not sure I want a 275/60. I'd rather put a little lower profile tire back there but make it wide.

I've got a B body Dana in my sig car and I'm running 255/50/16's on 9 inch rims with some room to spare.

5.5" BS on 10" wheel with a 68-70 b-body rear
5" BS on a 10" wheel with earlier b-body rear.

I have 5.25" BS on 9.5" wheel with 275/50/17 tires. I have a dana out a 69 b-body.

My axle measures 44" perch to perch. Is that a 68-70 B rear?

I have the 67 B body rear in my Cuda with the Dr Diff Relocation and stock springs
More Tire clearance to the springs is one advantage.

Yes, the 71-4 b-body is wider. I was only referring to the ealier b-body rears. Should of clarified that. Thank you.

I'll have to pull the wheels off to measure flange to flange but I'd guess it the 68-70 B rear as the wheels don't look "wrong" on the car as it sits now, just tucked in a little more than they should when you are looking for it.

OK, I got the Dr Diff kit in and installed. Nice pieces.

One problem now. The rear sway bar doesn't line up any longer. The end links are at too much of an extreme angle. And even if I was to keep the Ebody bar I imagine it would now be in the way of a wide tire.

What are my options?? Is there a B-body rear bar that will bolt in and line up??

Can I section the bar, remove 2 inches out of the middle and weld it back together with a steel tube in the middle?