I post this here becuse 69-72 disc's off a chevelle are a popular swap for 1 st gen nova's also some exchangeability to 3rd gen nova's . I parted out a 72 chevelle. put the disc set up on my 71 chevelle when I whent to napa to get rebuilt calipers we found they where 73 to 78 ? chevelle. the spread of the caliper bolts where wider looked way diferent. all spindals caliper brackets are all in my 71 chevelle with my rebuilt fron end , all looks good . has anyone used these parts for a disc converion on a first gen nova? or in a chevelle, I am wondering about track width ...ball joints ... might be somthing no one knew to rob parts off of for ?