>How can I tell if the input shaft is very slightly bent?  Wouldn't there be
>some difficulty shifting gears?  Wouldn't there be vibration and noise?  I
>haven't noted any of these symptoms.  I strongly suspect that the lazy
>bonehead of a previous owner caused the damage to my Bus's clutch by not
>installing the upper bellhousing bolts that secure the engine to the
>transaxle.

With the engine out, jack up one wheel and turn that wheel.  The trans shaft 
will turn,  anrd will wobble if bent.
  Chris Bridge
  
  Currently building an engine for a ''71 Westy (Sportsmobile?)
  E-mail cbridge@vt.edu