This is the original; the Manfred Mann cover was a much bigger hit.
In fact, I'll admit it, I don't think that I'd ever heard this version until recently. The Exciters were mercilessly covered by those English Invasion guys, and usually the Englishmen got better results. "He's Got the Power," maybe it wasn't a hit by Wayne Fontana and the Mindbenders but their version was great.
Whatever, I like this song, and I like it by the Exciters (from Jamaica, Queens! I delivered the mail there for two years!) and I like it by Manfred Mann too. There's always room for another good version.