I just recently converrted my Automatic to manual. It works great and so far I have no problems. But here the but I'm wondering if i should have went with the gsr 5speed vs ls 5speed. I hurd that you could use the gsr tranny on the ls engine is this true. p.s. for any one interested in converting here a list parts you will need

5speed tranny ls,gs,gsr,
transmission linkage
transmission mounts
clutch
flywheel
5 speed pedals
pressure plate
manual ecu
shifter and shift boot
clutch slave cylinders
clutch reservoir
matching throttle cable for pedal set
hydraulic lines
itermediate shaft
upper transmission mounts