Best to check with the manufacturer to see about spline compatibility, I understand that Mark Williams axles have a different spline angle than most others. As for axles themselves, I have had 2 sets of Strange axles in my Fairmont (33 and 35 spline), had 31 spline Mosers in my 85 Mustang, and currently have 31 spline Dutchman axles in my 59. No complaints with any of them. The Moser and Dutchman are considered "streetstrip" versions, and the Strange were drag race only versions.