What suspension upgrades should i do for $1200 big block dart

you said /6 car , and front end charging and rear springs and shocks . never said what r/e , stock as the car will not hold up . it needs to be a beefed up as well , not sure the best bang for the buck . seems that an 8 1/4 would be the easiest on you budget . and rear brakes a lot of guys here use the late model jeep disc stuff , it on a 8 1/4 in the jeeps . wonder if the jeep is narrow enough for the car ? anyone know . it a coil spring type rear end . that stuff can get cut n ground away , add perches for your springs to match rear spring locations .