The links below should help you select the correct tremec shifter for your application but if you are unsure please send us a photo if the gearbox you are running.

Tremec Magnum, F, XL, 6 bolt Aftermarket transmissions.
https://s1sequential.com/product/sequential-shifter-t56-magnum/

Tremec t56 GM From 4th Gen camaro and vt- vz Commodore, includes the borg warner boxes.
https://s1sequential.com/product/sequential-shifter-t56-gm/

Tremec T56/ Tr6060 Ford Falcon Ba- FG, Dodge Viper, Dodge SRT-10
https://s1sequential.com/product/sequential-shifter-ford-viper-tr6060-t56

Tremec Tr6060 late model linkage style Ve-Vf Commodore, GT-500 Mustangs, 5th Gen Camaro, 6th Gen Camaro, 1st gen ctsv.
Factory style fitment and most conversions https://s1sequential.com/product/t56-tr6060-remote-mount-shifter
Forward position direct mount to suit some trucks, cobra relicas and similar. https://s1sequential.com/product/mid-position-sequential/