What would it take

[adamsredlines]

Found a 8 3/4 489 case from a '72 Challenger.
What would it take to put it in my '72 Duster? I assume narrowed?
Whats a good price for one? (3.23 gears). I'm still trying to learn all this, and what I'll need for my 390 setup thats going in it. TIA!

 

[adamsredlines]

Answering my own question for width...

A BODY
'66-'72= 52 5/8"

E BODY
'70-'74= 56 31/64"


(For my future reference, borrowed from Demon408...)
Housing widths, flange to flange
A BODY
'66-'72= 52 5/8"
B BODY
'62-'63= 53 1/4" (And '64 Max Wedge)
'64 = 55 5/8" (Exc. Max Wedge)
'65-'67= 54 1/4"
'68-'70= 54 15/16"
'71-'74= 57 7/8"
'71-'73 wagon= 59 7/16"
C BODY
'65-'69= 56 3/4"
'70-'71= 57 7/8" (Chrysler & Fury)
'70-'74= 59 7/16" (and '69 wagon)
IMPERIAL
'65-'66= 57"
'67-'69= 57 3/8"
'70-'71= 54 3/4"
'72-'73= 59 5/8"
E BODY
'70-'74= 56 31/64"
A100
'65-'70= 56 3/4" D100
'65-'71= 58 5/16"
'72-'74= 59 7/16"

 

[HemiEd]

I am assuming you are saying you have found the whole thing, housing and all. If so, you may want to sell it to an E Body person, and get one for an A or B body. The E body unit is quite a bit wider, but still nice property.

 

[adamsredlines]

Now I'm getting confused. This is all new to me but I'm reading that my car should have an 8 3/4 rearend in it...I was under the impression the A-body rearends were not very strong. Whats the piece of the puzzle I'm not understanding?

 

[67Dart273]

Now I'm getting confused. This is all new to me but I'm reading that my car should have an 8 3/4 rearend in it...I was under the impression the A-body rearends were not very strong. Whats the piece of the puzzle I'm not understanding?

There are generally 3 different rears found under an A body, YOU must find out which one. The two weaker ones have removable rear covers. The 8 3/4 is the only Mopar rear with a "third member" type setup.

Ignore the bottom two on this chart:

 

[adamsredlines]

Yeah back to square 1 LOL...

 

[adamsredlines]

And thanks for the chart, I'm gonna save that to my phone for help on the field!