Yes, I agree, $600 is A LOT exaggerated and yes that is Trailmaster's price. From the research I have done, the trailmaster has a special double joint. THe name slips me at the moment, I think it is double cardon joint. ANyway, A freind of mine has a 2001 Sport with the trailmsater kit and he bought a new shaft for $200. It replaced the CV joint at the TC but grenaded the dana 35 a few months later. I suggest you get trailmasters shaft, it my be worth the money.
Soupbone, the shaft on the 2dr is long enough, you won't have any problems there.