Identifying a 10 Bolt Rear End

[69-er]

I have a 10 bolt bare housing allegedly out of a first gen. The flange to flange dimension is 54.5" and the perches are 42 5/8".

Is there a way to determine if it's an 8.125" (8.2?) or an 8.5" ring gear?

Do my flange and perch measurements correspond to a first gen rear end? I would imagine if the measurements are for a second gen then the gear would be an 8.5", correct?

BTW, the brake hose bracket is welded to the driver's side axle tube instead of bolting to the top of the cover.  The only axle code I could decipher is "TAC"  The rest looks like it has been ground off.  The "webs" on the pumpkin aren't large enough for the casting date or casting number.

[rich69rs]

Link may be helpful:   http://www.camaros.org/drivetrain.shtml  as far as identifying any casting numbers.  Open the link, scroll down about 60% of the way to the section titled:  REAR AXLE NUMBERS.  Some of the info there may be useful.

[bertfam]

THIS might help. It shows the physical differences between the 8.2 and the 8.5 axles.

Ed