I believe Testors Olvie Drab is pretty close to 179. I'm talking in the classic little square Testors bottles, not the Model Master color, though that may be the same color.
If black works for you, don't give up on it, but it's always nice to know you have options. I was in a figure modeling club some years ago and this old guy always primed in white. I know that a lot of the masters do too. I use white or gray and then I under coat each color in acrylic. But then I use oils almost exclusively for the final color, so an under coat may not be necessary for enamals. Something to play around with though.
I learned from one of Sheppard Paine's books how to mix OD from basic colors and that led to experimentation and a feel for the different shades of olive greens. There are four basic tone variances, as I see it. Red/brown, blue, yellow and gray. There are crossover tones between any of those of course. Most of the olive tones can be made with black, yellow and red, and lightened with white. The white also helps to gray it out. If it's too red, add more yellow and some black. You can then add blue to pull it blue, or you can add much more yellow or both yellow and blue, or some brown or more red. Then you can add more black and white to further gray it out. Takes a little messing around, but once you get a feel for how to get the basic color there's no end to what you can come up with. Plus it helps develop your sense of color matching when going off of color references, because sometimes the colors out of the bottle just aren't quite right.