I am currently selling my 10 bolt that i pulled out of my 1968 gto. However, when measuring the flange-to-flange measurement, it comes out to 56.5 inches. That's the measurement for a 64-67 a-body rearend. (68-72 should be 58.5).
THIS MEANS THAT MY REAREND IS A 64-67 REAREND RIGHT?
However...