Yes that is a great deal, I bought mine like that. Btw get the bearing kit for the gears, that way you have new bearings in the car. Btw I saw you want to lower your stang, first get some quality shocks/struts and springs of your choice, anything lower than 1.5 inches will need caster camber plates.
Good luck and welcome to the never ending modding of a Mustang haha.
Ooops nvm I saw that it does come with the bearing kit, that's a good deal!