Thanks to my "twin" brother for catching this one. A mutual friend (Phillip) posted this on YouTube: it is a rare alternate mix of the Brothers Johnson hit "I'll Be Good To You," a promo-only release on 7" 45RPM single #1806. This is the first time I've ever heard this mix (which has some noticeable differences), so this is quite a surprise! I have included the more common version below, for comparison. Enjoy!
Original version below:
Original version below: