An accurate 8 3/4" rear axle width list

Ok, so, I've posted parts of this list a few times, normally in response to some of the really inaccurate charts and lists that are out there and posted too frequently. It's not my list, I sourced it from the internet but I can't remember where. Since the time I downloaded it several years ago, I have personally confirmed a bunch of these numbers. The A-body numbers, the E-body numbers, several of the B-body measurements, a couple of the C-body measurements, and even the D100 measurements. They've all been spot on, so I have no reason to suspect any of the measurements I haven't personally checked.

Everything is for 8 3/4 axles with the exception of the A-body 8.25 and BBP 7.25 measurements I added myself, and the F-body 8.25" measurements.

I also added the A-body BBP 8 3/4 width, that's for an A-body housing with axles that have the standard BBP axle flange offset and use 10x2.5" or 11x2.5" BBP brakes. It should be accurate within an 1/8".

8 3/4" Housing widths, flange to flange

A-BODY
  • '66-'72= 52 5/8”
    • BBP 7.25/8.25 = 51.5”
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"
F-BODY (8.25" axle!)
  • ’76-’80= 54.34”
.........................................
........................................

8 3/4" Rear end widths, drum-to-drum:

A-BODY
  • '66-'72= 57 1/8” (or 57 13/16” for BBP axles and brakes)
    • BBP 8.25/7.25= 56 3/4”
B-BODY
  • '62-'63= 58 1/2" (And '64 Max Wedge)
  • '64 = 60 7/8" (Exc.Max Wedge)
  • '65-'67= 59 1/2"
  • '68-'70= 60 1/8"
  • '71-'74= 63"
  • '71-'73 wagon= 64 3/8"
C-BODY
  • '65-'69= 61.75"
  • '70-'71= 63.0" (Chrysler & Fury)
  • '70-'73= 64 3/8" (and '69 wagon)
IMPERIAL
  • '65-'66= 61 15/16"
  • '67-'69= 62 5/16"
  • '70-'71= 59 3/4"
  • '72-'73= 64 9/16"
E-BODY
  • '70-'74= 61 5/8"
A100
  • '65-'70= 61 3/4"
D100
  • '65-'71= 63 15/16"
  • '72-'74= 64 3/8"
........................................
........................................

Spring perch widths (center-to-center)

A-BODY
  • '66-73= 43"
B-BODY
  • '62-'70= 44"
  • '71-'74= 47.3"
C-BODY
  • '65-'73= 46"
E-BODY
  • '70-'74= 46"
F-BODY (8.25" axle!)
  • ’76-’80= 44.5”

Do you have any information for an A Body 1963 Plymouth Valiant Signet. I am wanting to upgrade from /6 to a 318 and it is recommended that I change the rear to 8 3/4...I have no idea just what I need to make this change...do you know?