SPAZZ= broken front CVs, Swordy=???, Zeus=initial 4.77 trouble, but I think he fixed it, Kpaske=uninstalled(but not for sale last I heard), Alaska=???.
They are out there, just difficult to find. Your engine will rev higher and you put more stress on the cvs, but you accelerate like stock, but with bigger tires. Last I heard a set goes for around $1,000 when available.