I helped my neighbor install bucket seats in his 70 nova,it had a bench seat,only difference in the floor board were the inner bolts for the bucket seats were not there,we used chevelle bucket seats, they were the same seats as the Nova [69-72].he purchase [you could cut these brackets out of another junk nova with bucket seats,you only need the inner brackets,the out side bolts are correct for buckets or bench seats]a set of brackets with the correct bolt locations already on the brackets,all we had to do is to weld them in place,we ran a string from the front outer bolt location on both side,we then measured the distance between the the bolt holes on the bucket seat tracks,this gave us the starting point for the front bolts,we tacked welded the bracket at the front,then aligned the rear bolts with the tracks,then welded everything in place,very easy installation.Good luck