[cobrashoch]

Keane - STUFF TO KNOW. Trans locks and locking converters do NOT work together.
On trannys with locking converters you are extremly limited to the stock type size converters.
C6's, overdrive boxes and locking converter boxes run hotter, weigh more, and are horsepower sponges that require tranny aux. coolers on Cobras. Very bad to at least to not as bad is the range for these boxes for Cobra uses. The Art Carr AOE box is exceptable but is a bit expensive.
After foolin' around with the various automatics out there and weighing costs with performance I've come to the conclusion that the right thing to use on a street Cobra is a built C4 transmission, with the very short tailshaft that was used on some utility vehicles, together with a Gear Venders overdrive unit. The tranny can be had in the 1800$ range (U.S.). The Gear Venders OD can be added later and cost 2500$. Converters vary from about 200$ to 800$ dependent on application. Such a combo. can be for the street built to take well over 800 horspower. The converter should be a 10 incher with a 2200 to 2500 stall. The car should be geared low enough to keep the revs up above the stall in high gear.(Otherwise heat will be a issue) Using the smallest converter possible will give you the best torque multiplication factor from a dead stop at launch. Good for the stop light boogie.
I am currently switching to a Coan (approved case) Powerglide, but in my case this is a VERY special application that not good for most streetcars let alone a Cobra. All automatics have ups and downs. The trick is to figure out what you really want going in. Keep talking to us, we will help you figure this thing out. Talk is cheap but it will save you $$$$$ later.
good luck!

Cobrashock