tlok may be ok, but then again it could need rebuilding. go to www.summitracing.com and look around for a rebuild kit... but first, if you do get it, have the tlok checked out. i think the rebuild kits costs <50 bucks. it's not a bad deal, assuming they are in good condition.
get new unless you totaly take in teh fact that soon in the future or imediately after install they will whien and make noises, clunking loud bangs, be to worn, not engage right, need rebuild when you get them before going, in and when you go to teh track or just ragging on it on teh street you may break them and need to be towed home and be back at the starting point well behind the starting point cuz the car wotn be drivable until you get new parts.