Well just to clarify things -- the Charger will not be pounded on the race track, it'll be a show car, occasional highway or cruise car, and from time to time I'll take her to the track but it's not a full blown race car. So it sounds like the 23 spline should be just fine until I get the $$ for a Passon.

Thanks for the help and clarification guys -- it doesn't sound like anyone's had a problem with the 23 spline and why shell out 2grand for an 18spline if its not needed?