Hi Brian,
what did you mean with 69,9" ?
Are you sure about the R. 31 1/8"?
I think Brian meant 69 Mustang with 9" rearend and 28 spline axles. I think in some countries like where you're from, you guys use a comma (,) in a decimal number, whereas we use a period (.) for a decimal number. Example: Yours, 69,9 Where we say 69.9.
I think I said that right?