Can't find matching paint!

I researched the paint code and got a 71 Plymouth Curious Yellow code Y3. PPG has a recipe in single stage enamel and also basecoat/clearcoat that I want to use. I had them mix me a spray bomb in enamel so I can spray something and make sure it matches. If it does, I'm buying a quart of basecoat, a quart of satin black and a ton of clear. You will never feel the stripes! Thanks for the help guys!