Weird rear measurement - good link

[Ishmael]

I just measured my pontiac rear in my 68 firebird that was originally a drum brake 6 cyl car. I measured from the outside of the flange (mounting surface) and found it to be 59 3/4. I thought that couldn't be right so I measured it a number of times thinking it should be 60" like the camaro. All the 67 firebirds I read about have a 61" or so and the 2ng gens all are supposed to have 62.5" rears. What gives with my rear?

Here's the link where I got the other measurements - lots of different cars:
http://www.carnut.com/specs/rear.html

[big gear head]

The second gen rear end is 61 inches. I haven't measured the Pontiac rear end, but was under the impression that it was also 61 inches.

[Ishmael]

I was under the same impression. But its a pontiac rear and its less than 60".