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RDRZ · 03-20-2002, 09:28 AM

Hey everyone,
A friend of mine told me that the Ford 9" in my 1970 Mach 1 is either a 14 spline or a twenty spline. He said that with the motor I am putting in it, I will rip it apart (I am putting in a custom built 514 Stroker CJ with approx 950 hp). Is my rear end really only a 14 or 20, and if it is, should I change it to a 37-spline?

03-20-2002, 09:28 AM	#1
RDRZ Registered Member Join Date: Aug 2001 Location: Citrus Heights, CA Posts: 74	9" rear Hey everyone, A friend of mine told me that the Ford 9" in my 1970 Mach 1 is either a 14 spline or a twenty spline. He said that with the motor I am putting in it, I will rip it apart (I am putting in a custom built 514 Stroker CJ with approx 950 hp). Is my rear end really only a 14 or 20, and if it is, should I change it to a 37-spline?