Mack TC150 transfer case

I am building a 6x6 International paystar. The original spicer transfer case was severely rotted due to being under the salt sand body. I bought a Mack tc150 to replace it. I got the yokes to hook to my driveshafts and built mounts for it before I realized that the Mack transfer turns the front driveshaft the wrong way . I've talked to a few local guys that say they can remember being able to change rotation direction of the front driveshaft by changing or flipping a gear in the transfer case. Any truth to this? Hard to find anyone around here knowledgeable on these cases.