Original length of air injection tubes?

[clm69z28]

TheCRG smog information indicates that the  "air injection tubes were short pipe extensions (2-13/16 inch long) that were installed before the air manifold was installed".  The "correct" replacement parts that I bought are 2 3/16 inches long. Which is the correct measurement for the 69 Z application?

[IZRSSS]

I believe you answered your own question. CRG's report states air injection tubes measure 2-13/16" long. Last paragraph...
http://www.camaros.org/emissions.shtml

[KurtS]

I'll have to dig out some of my tubes to confirm I didn't make a typo.
Are you making the system functional?

[1968RSZ28]

2-13/16" long is correct.  I just measured the ones on the spare '68 Z/28 engine (8N391571) I have.

Paul