I got bored and looked up the GT350 transmission, which is the TR3160. It's 121 lbs but only has a torque capacity of 405 lb ft so I don't see the GT350 making anywhere near the torque of the LS7 but, if the weight rumors are true, it won't need to.
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Originally Posted by SEVEN-OH JOE
You're likely to get your wish on this one. After all, who reveals first? GT500 or "unrestricted" HP Camaro? This time, like last, going second could again make the "follower" the "leader". It'll work well for the GT350-R killer as well.

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It would work if the ZL1 was going to get a one off engine but that isn't the case. It's getting the LT4 and won't make more than 650 hp.