I was looking at Craven Speeds sight and noticed i cant get thier short shifter because my shifter housing is the pre december 03 housing. Is their a way to replace my shifter housing with one from jan 04 till he end of the r53 body style? well actually is it an easy swap or not worth it. Thanks !

 

Yes you can convert it, but you have to replace the entire shifter box and both shifter cables.

A much more affordable option woul be the early version of the adapter:
http://www.waymotorworks.com/helix-short-shift-kit.html