IIRC the Plymouth WB is slightly shorter (1"?) and it was basically the location of the axle on the leaf springs......not really anything significant; only enough to cause headaches to us restorers 40 years in the future!

Dave

1970 Super Bee 440 Six Pack 1974 'Cuda 2008 Ram 3500 Diesel 2006 Ram 3500 Diesel 2004.5 Ram 2500 Diesel 2003 Ram 3500 Diesel 2006 Durango Limited [url] http://1970superbee.piczo.com [/url]