You may find these sites to be helpful. In my experience as much as
1" difference in spring perch distance translates to 1/2" per
side, and for daily use the springs easily accommodate that.
Bill Huff
https://www.allpar.com/forums/threads/rwd-axle-widths-and-interchange.117913/
http://gasalley.thetumbleweeds.net/tech_archive/mopar/chrysler_8_3.htm
https://www.bigblockmopar.nl/tech/mopar-rearaxle-dimensions/
At 11:38 PM 8/26/2018, 'skyhawk@xxxxxxxxx' skyhawk@xxxxxxxxx
[Chrysler300] wrote:
Hi everyone,
I looking for information as to which 65-up C-body 8 3/4 rear axle( the
whole thing, drum to drum) is the least difficult to install in a 61
300G, especially information from someone in our group who has done a
swap like this. Perhaps they can tell me which cars I need to be looking
at as a possible donor. Thanks in advance. Dennis
