thanks all for the input, I have looked into this for a while, as I'm in no rush and most cobra t56's are not cheap and there is an abundant supply of LS1 T56's for $1000 or less. I'm doing a coyote swap and planned on a t56 to handle it, my research has shown I need an input shaft (most say the 10 spline is meh anyway), different driveshaft yoke, cross member, bellhousing, midplate, and a way to deal with the hydraulic clutch which I plan to change to anyway. Also redoing the wires for the reverse lockout and a couple minor things I cant recall.
Anyway, I found a t56 Service Manual at http://www.ls1.com/forums/f65/t56-service-manual-107802/ and as far as I can tell the bolt patterns for the bellhousing's to the trans body are the same. I came across someone selling a cobra t56 bellhousing for a nice price so it seems now it's worth it. Thanks again for the responses.