I took advantage of the sunny, windless day. Using Pat's, (landman), method of plastic spoons for paint samples, to figure out the yellow. I used 6 different base colors/primers, and the 4 shades of yellow I have, I got some great results.
It seems that base colors don't really matter to much, but, I found the Tamiya Chrome Yellow is real close to CAT yellow, Tamiya TS-16 and Krylon sun yellow are just about perfect and Duplicolor Daytona yellow is too light. I played with base colors for the green. Found that base coats really change this color.
Since deciding on Krylon Sun Yellow, I resprayed the engine and then sprayed Tamiya Pearl clear over it, just like the 1:1.