For the gear drive you dont need the screamin eagle plate and oil pump. Those parts are for tc88's to convert them to hydraulic cam chain tensioners. If going to gear drive all you need is the new cams and gears.
Although I dont know the exact cost of what the dealer will charge I would say a rough estimate cost of parts is around $600. Add another $600 for labor. Although this is just a rough idea your cost should be in the neighborhood of $1,200.