From the GTOAA Legend Sept/Oct 1990.

They took a valve cover from a original 71 Catalina and wet
sanded it to get back to the original color. Then had the paint matched exactly.
Here is the formula as written in Legend.

PPG Delstar Acrylic Enamel Formula develop by Bill Uttich, Allen Automotive,
Boulder CO. 303-443-1811

Mixing Color                                 Quart Formula
DMR-441                                     72
DMR-486                                     148
DMR-411                                     182
DMR-490                                     275
DMR-410                                     385
DMR-400                                     605
DMR-495                                     625
DMR-499                                     1025