Bill, you have that backwards.If they are a 6 and a 5, that indicates a close-ratio 4-speed with a 2.83:1 rear end. That would make your car 1 of 46 with that drivetrain combination.
Bill, you have that backwards.
Axle code 6 = 3.00 open
Trans code 5 = 4 speed wide ratio.
Making that car 1 of 67 with that engine/trans combination.