64 dart brake/suspension upgrade

Just learned my 64 cuda needs new brakes in the rear (parts missing after shop pulled them apart). How much should a set of new disc brakes cost without labor. Don't need slotted or drilled variety, just something modern that will stop the car. Lastly, how much shop labor is involved..estimate for both fron and rear. I'm being quoted around 4k for parts and labor which seems way too high...