im purchasing 4.10's for my 1999 mustang, it has 20,500 miles on it and i was wondering if i should purchase the master bearing kit with it or if it is just a waste of money with only 20,500 miles

also im leaning towards the ford frpp gears because i hear its an easier install because my dad and i will be installing them ourselves is this true or should i just go with the cheaper motive gears?
thanx

 

I have 37k miles and I got em. If you have the extra money I say go for it. About the install, I'm not sure, Ive heard that but I dunno if its true

 

FFRP come with an installtion kit, and the motive gears are cheaper but youd have to buy the install kit so its the same price. At 20k you dont need a rear-end rebuild. gears and install kit is all you need.