pic of my 72 valiant

The donar is the cheapest usually. There are several places making the conversion kits. I have SSBC that is Stainless Steal Brake company. A big one is Wildwood Brakes and another big money is Beahr. Right stuff detailing as well look in a copy of Mopar Muscle you will see several adds. Check your tire fitment most require a 14 inch tire or larger. Also if you go the donar route get the prop valve and all the rest off the donar car or the setup or spend the money and get the Kelsey Haynes there is a set for all 4 for 850 on hear. I paid 750 for mine and got a 150 rebate through Jegs. Do your price hunting. Most of these companies make it easy finding the right kit. 500-3000 all in what you want to spend and do. Is shes a driver or a racer. Your fine leaving stock drums on the rear for most applications. Power brakes are ok I like my manual and it takes up less room in the bay. Hope that helps.