A tranny story (t56)

There is no bellhousing for the challenger input shaft length. The midplates are the same. Challengers midplate is .400 thousandths thicker

My original idea was to make a spacer to make the challenger trans work, but then the shifter was an issue.

The remote shifter with the tr6060 is the challenge. However there is an adapter to use the mid shift location. (I did not know of this at time of tailhousing purchase)
Either way building a driveshaft for the flange or the slip yoke is a wash. If you swap the tailhousing and mainshaft it is near the same cost of the "special driveshaft"