Originally Posted by oldbluetruck
What is the OD unit?

TIA

Dennis,
I'll be using one of these Overdrives from Advance Adapters.
Goes between Bellhousing and transmission.
Moves everything back 7 3/8"
(they say 7 1/2")
see:
http://advanceadapters.com/product/1941/760002M-27.html
Note:
Cheaper thru Summit

Pete