I am considering buying a used custom cv driveshaft off craigslist for my xj that measures 32-34". I haven't installed an sye yet, but if I measure from flange to flange and if it matches up in size should I go ahead an buy it? Its a great deal and I don't think it will be around long enough to wait until I have my sye installed. How exact does the shaft size need to be? Thanks for any help you can offer.