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