As far as I know, Liberty does not make "stronger gearsets" just different ratios. Ive called them and emailed them before trying to get my hands on the purple and red stripe stuff, no luck. All a crash box does is help high rpm shifting, does nothing for strength. I was talking from a strict strength standpoint AFTER modifications
Don't get me wrong, 18 splines and 23 splines are very tough peices, was just stating some info...although mopar guys will always question something that goes against their brand