Thank you...No "sure grip." The rear end in my car at the time, was my own installation. I can't remember what the gear ratio was (either a 3:73 0r a 3:91) It was a 8 3/4 rear end that I modified myself, from a circa 61-62 Dodge Station Wagon. I can't remember how many 7 1/4's I tore up before I did the mod. The clutch was still a weak link.