The Motive gears only come with the ring and pinion so you have to but at least the installation kit, I think the Ford gears come with the basic kit so the prices are pretty close but you will need a speedcal...You could go to
http://www.dallasmustang.com/index.mvc?p=973101 they got em for like 100 bucks...I'll be getting one in a week for my gears that I should have in like 3 weeks...damn biweekly checks.