ok, wow driveshaft length chart problem

Jim Lusk said
My guess is that the difference is in the u-joints (Chrysler used two sizes and there did not seem to really be a pattern as to which you would find based on engine option). Get the car together and measure with the weight of the car on the axle.

X2 on u joint difference.
Also slip yoke length is different between 904 and 833/727

For a ballpark figure 904/8.25 111" WB 52.75" Always measure at ride after pinion angle is set.