I don't know about Eastwood. I use English Paint here in Dallas, but on the running boards please consider painting with catalyzed (hardened) paint. 10, 15 or 30 years later you'll be glad you did. As for colors, you're on the right track. I've done it both ways. You get really tired of the same color everywhere and the Chevy folks knew that.

~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end