8 3/4 Center section swap

If you don't want to change the yoke, have a 2nd drive shaft made and a front slip yoke. Probably about the same price as buying a yoke and having a shop install it
I was off from work today and decided to take the center section to a shop for the yoke swap. I looked at the rear and measured the yoke with 2 U joints I have to go into my driveshaft. They fit like a glove in the yoke currently in the rear. I went online and got measurements and it is the small yoke after all. So that rear didn't originally come in my friends Cuda, it would've had a large yoke in a 70 Cuda I think. So I need to clean up the rear center section and give it a nice coat of paint. What color/paint should the center section be?