I just got a pair of these rims from my bro. The rim has K1 8 29 XG
The 8 and the 29 are on opposite sides of the valve stem. Will these fit a 67 with disc brakes. Both rims are the same markings. Trying to get thiner tires up front from the 15/7 rims i have now.

XG is the code for 14 x 6 disc brake rallys for either 68 or 69 model year, and the date code indicates yours are 68. So they should work fine, assuming you knew they are 14 inch diameter.

http://www.camaros.org/suspen.shtml#Wheels

Great!
thanks