For those of you curious about the orange M23's which raced at the beginning of '76 I'm posting available orange decal decal info here. F'artefice makes orange decals in 1/20 and 1/12 as you can see in the pic, I threw a fluor red decal in for comparison. the orange on the 1/12 set is a few shades brighter than the 1/20 sheet.
My orange M23 build thread.
http://www.f1m.com/forums/viewtopic.php?f=29&t=26214
Regards, Brian