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there is no way in hell that will work. For starters, that is a double/single synchro transmission. Second, that is the wrong mainshaft since the transmission bolts TO the differential.
A Camaro/Firebird/Viper kit WILL NOT work. The parts will not physically fit. The gears and such are all different in a triple/double synchro trans than they are in a double/single synchro trans.