I had a nice long reply written up but it got erased! Gah, let's try this again...
James, that's exactly what I was looking for! I find the difference in numbers odd as well, but with as much as I can find, it appears to be correct, at least on paper. I've been on Jim Shea's site and pulled numbers from the papers he's posted, and it seems to back up what I'm looking at.
I found an article that Hot Rod published about different steering boxes and also included a nice little chart with all the specs listed. I didn't see where it said that they obtained that information from, so I'm not sure about it's accuracy, but again, it seems to be correct. They list a 1967 Camaro as having 87 Degrees of total travel, while 1968 and 1969 use only 67 degrees total. You can find the chart here about 1/4 down the page: Steering Box Upgrade - Hot Rod Network
I've found plenty of specs from Jim's site, and I'm assuming that they are measured from center of steering rather than total travel as in the Hot Rod chart.
For example, Jim lists the 1967 Camaro V8 as having 43 Deg, 30 Min of travel. One oddity is that it shows that RS cars got a DIFFERENT box with only 35 Deg of travel! This is the only instance I've found where it specs out multiple ranges of travel in 1967, but I could see it happening as it seems like there were also multiple length steering arms, pitman arms, and idler arms in that year. This same list also shows that 1968 and 1969 are both different with 31 Deg, and 32 Deg, 15 Min respectively. Negligible differences between the two, but certainly different from the 1967 specs. http://jimshea.corvettefaq.com/wp-co...ev02JA2013.pdf
Jim also lists the specs for the A-body Chevelles, with 1965 through 1970 being the same at 43 Deg, 30 Min. As you can see, this is the same spec as the 1967 Camaro. http://jimshea.corvettefaq.com/wp-co...ev02JA2013.pdf
Additionally, Jim has provided specs on the 1993-1998 Grand Cherokee steering box, which provides us with 43 Deg, 45 Min of travel. This is basically identical to the A-Body Chevelle as everybody already knows, but seemingly the same as the 1967 Camaros, also! http://jimshea.corvettefaq.com/wp-co...ev01JA2013.pdf
Is there anyone here that can verify otherwise?