You make it sound like that's the 2nd modification that you do to a Syty, right after an intercooler pump :wink:
Not many have done the 9" rearend, but I'd say you are better off calling some aftermarket companies to find 'em to bolt in. Mark Williams, Currie Enterprises would be the first 2 on my list probably...
Out of curiosity, I've heard like 500 questions from you relating to huge buildups costing big money. What do you have in mind? What are your goals? What is the budget?