I just bought Scat Rally seats for my '70 sports roof. As I suspected, they sit too high on my seat risers. I believe that the risers in my car are not '69-70 risers as my stock seats sit quite a bit higher than my friend's '69 Mach. I haven't decided if I'm going to get new risers or just add support to floor and bolt seats right to floor. I don't think they would be too low on the floor but could also cut down risers. Either way, I'm also going to weld subframe connects in as well. Would love to have your thoughts or recommendations. Thanks!