[67rs/ss]

I have a 67 Camaro L78 with O-O paint code body LOS 34502. The color on the car where paint is still remaining is a dark green metallic. Through research there appears to be a group of 67 Camaros with this same color. On this site body LOS 34507 mention that he spoke to the original salesman and he said it was Glen Green GG (1965 corvette color)GM WA3366.
I have spoken and emailed the owner of body LOS 34500 and he said British Green ZZ (1968 Camaro color) and 983 (1968 corvette color) both GM WA3829. But all 3 cars are 67's so 983 is also used in 1967 corvette as Goodwood Green GM WA3626. All 3 have different GM codes. I have the formula for 1965 WA3366. My plan is the make a test sample of each GM code but the other 2 WA3829 and WA3626 does not come back with a formula.
Anyone here have older info on these paint codes and formulas? TIA
Tony