I checked out you build thread that's already one sweet ride.
How are the splines on your input shaft?
Since you have a 67 you can still get the splined adapter sleeve for it.
https://www.transmissionpartsdistrib...2-ton-3890590/
Because of the trans adapter the married style shims on the rear of bearing caps and from what I can tell the front output shaft is not shimmed.
BTW there is a difference in the married and divorced front output shafts.