If you've got an auto LS and want a manual GSR... save your money and buy a GSR. The conversion to a manual, combined with a properly built LS-VTEC motor will cost at least $2500. Also, it will decimate the resale value if your auto LS.
I don't mean to piss on your fireworks, but there is a point at which modifying can be taken to absurd extremes.

h: