If you choose to upgrade to the Saginaw, it will bolt up to the same bellhousing and clutch assembly you have now. You will need to modify the shift linkage a little to make it work with your present column shift, IIRC, and convert to the open driveline.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!