Iam trying to find a posi 10 bolt rear end for my 64 chevelle and getting all kinds of measurments on length and center line of spring perch. Does anyone know what the correct measurments are for length and center line of spring perches and if any other year chevelle rear end will fit in my car. I was told the 64 was a different size then any other year.

64 to 67 is same lenght. 68 to 72 is one inch wider but will bolt direct in if you have room for a wider rear.
Good luck.

Marcus

Thanks for getting back to me. I will open my search