Correct base model depends on OE configuration (per source vehicle). All are unique and NOT interchangeable without reconfiguring the trans.
Most GM T5 use same base connection BUT:
S10 base is for regular "straight up" bellhousings
Camaro base has stub angled toward right to compensate for special OE rotated bellhousing
DO NOT BUY the Camaro base unless you are using the OE rotated bellhousing w/ rotated trans!
Holden Commodore VN-VS use the Ford T5 base
Most Ford T5 use the 1983-2004 Mustang base
2005+ Mustang T5 w/ OE remote shifter DOES have provisions for direct mount base but some parts must be removed. Bolt pattern is different from earlier models. Email us if you need a base for this model
1996-2001 V8 models = T45; 2001-2004 V8 models = TR3650; the bases for these models are unique - see separate listings
Jeep 4x4 "5-bolt" base available by request - contact us
AMC 2wd use the S10 T5 base
"World-Class" and other internal variations mean nothing at the shifter level