Man you need 33 spline or better. A ford big block came with 31 splines and I can snap those like pop corn. If you have power and tourqe in the long run you gona speed the money anyway as your power increases. Strange willnot garintee anything less than 34 anyway. Save ya some headache and do it right first time. Well being you looking a set now you must of broke something. If you had placed good stuff you would not had made this post. Not being smart man, just trying to help ya be safe .I really need the v8 spindles from a falcon or mustang.