its a 727, right?
904/ 727 is easy to ID. Look under the car on the passenger side at the pan. If it's straight sided, it's a 904. If it's got a bulge in the pan, it's a 727
The 727 bulge:
Here's the rear axle chart:
904/ 727 is easy to ID. Look under the car on the passenger side at the pan. If it's straight sided, it's a 904. If it's got a bulge in the pan, it's a 727
The 727 bulge:
Here's the rear axle chart: