what kinda shifter if for this tranny?!

I bought a 97 cobra with vortech supercharger. I know that STOCK these come with a T-45 tranny that accepts the same shifters as a t-5 transmission. I attempted to install my steeda tri ax shifter and discovered there is 6 bolt holes in a shape like a square with another narrower end 6 corners to mount the shifter. Im guessing its an upgraded transmission. The t-45 has 4 bolts.
what kind of transmission is this? I think its a TREMEC something!
_____
|o o'-----,
| o| <--this is the shape ! of the shifter mounting area
| o|
|o___o.-----
 
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