4 Spd. to OVD swap

[A666K@aol.com]

Hi all, 
I am possibly going to be converting from the 4 spd. to OVD.  The tranny that 
I am getting is from the bellhousing to the end of the driveshaft, and will 
include the speedo cable. I does not have the crossmember/rear mount thing. 
Other then that, do I need anything else? ( I have searched the archives 
but..)I have heard something about the speedo calib. being diff. ?! Any 
thoughts?
TIA,
Avi 
P.S. This is all for a '78.