Originally Posted by Yadkin
The Cruise-O is a great transmission, so if you have one, consider rebuilding it. Find a local non-franchised shop. Or if you're adventurous, do it yourself. The Shop Manual has detailed instructions. You will need an inch-pound torque wrench for a few minutes during reassembly.
It's a good transmission but certainly has some weaknesses, like the tail shaft casing being prone to breaking under load. I think the C6 conversion is a good idea for anyone putting some extra HP in front of it.
If you do a search I remember reading a complete thread on the conversion and what was involved.