Dude, this isn't a flame and I appreciate you taking the time to respond, but....
Dude you will lose your limited slip in the SC. I wouldn't do it. Switching gears or the t-lock carrier is something that you need a shop to do with the right tools or else your rear end will howl. Just leave your cougar alone and find a diff from a 89-93 auto SC. It will have the t-lock and 3.27's.
You can't make a statement like that and expect to retain any credibility!
You don't have any information about me, my education level, my skill level or my mechanical aptitude, other than what I've mentioned in my previous post!
You mean YOU
would use a shop to change your gears/T-lock. That doesn't mean that I should. I don't know how old you are or what experience you've had, but don't assume that others are at your level, or below. Just because I haven't done it doesn't mean that I'm not able to do it properly.
My background is in machining of Aerospace and Automotive parts, Tool design for manufacturing, and Tool making for manufacturing. My title now is Manufacturing Engineer, but in the past it has been Machinist, Toolmaker, Tool Designer, CNC programmer/operator, and Manufacturing Technologist. I can measure and machine parts to .0001 inch accuracy with the proper tools. I have access to a machine shop with several milling machines, lathes and surface grinders. I personally own a set of 0-6" micrometers, a surface plate and height guage and 3 different dial indicators. I work with pneumatics, hydraulics, gears, belts, cutting tools, steel structures and logic controls almost every day.
Trust me....I can handle the job. I wouldn't have even mentioned it unless I thought I had the ability. That doesn't mean I know everything about it and don't have to ask questions to those who have more knowledge/experience than I do. It also doesn't mean that just because I can do the job, that I want to do it, or even that it is wise to do! That's the type of information that I'm looking for here....practical experience and advice from those who have done it or have information about doing it. Thank you to those who have answered what I have asked.