I'm not familiar with the north end of a southbound LS 1. The bellhousing I'm using came from the same 02 Firebird as the T56 and other than a missing bolt hole and maybe different sized dowel pins you can interchange any old Chevy bellhousing. The beauty of making the back of any motor the same pattern, flywheel starter dimensions as a Chev is that you can then buy an adapter to bolt it to about anything from a Model A to an F1 gearbox.
