I'd say yer missing the fact that there's a big difference between the lacquer that was used back then and whatever modern paint system yer tryin to match it with .... and the fact that lacquer reds were notorious for changing over time .... and color chips change over time as well
if PPG says it's the right red, it's closer than anything else you've seen, although matching lacquer with enamel or urethane never really works ... maybe you need a good paint person to fiddle the formula until it's something you like ... then remember it's gonna look different when it dries
glad to hear ya found a bodyman willing to fly at it!!
Bill
