I've started the restoration of the underhood area of my Challenger. It's a 318 car but I've built a new 360 to install. Before I install the motor, I'm cleaning up, replacing parts, and repainting the underhood area. I could use some help to know what should be body color, what should be black, what should be left natural, etc. I'd like it to look as original as possible under the hood. It's an FY4 car so I'm sure the area behind the grille should be blacked out. Where does that begin and end? Also, should the cowl be blacked out as well? I thought I read somewhere that the blacked out cowl was a '70 thing. It's also an A/C car (which will be operational) if that matters...

Any and all help and pictures would be appreciated!