Mopar clutch posi? Boom! Not impressed.

Cone, clutch, locker, spool .....in order as far as strength. With a stick car or trans brake running 11's or faster with a strip only car, I would recommend a spool. Ring & pinion, driveshaft, and u-joints will be your next weakest link. Sounds like many of you have good luck with lockers though.
toolman

I agree....ran a spool on the street for years and never a problem 8-)

Rickster