If you bought your bike in Petal, you were definitely in my neck of the woods...you're lucky I didn't see it come up for sale! I don't know much at all about my bike. I think maybe it was restored in the last 10 or 15 years...it looks to be original to me but there's a few things about it that make me believe otherwise. It looks like it might have been painted at some point, and there are numbers engraved on the engine block...like it came from a parts inventory at some point. If the motor was replaced, they were lucky because the engine serial matches the year model.
I've been thinking about riding the Trace sometime..maybe closer to the fall, so I might be close enough to stop by Vicksburg if that's something you'd be interested in doing. I just like meeting people with similar interests, especially if that interest happens to be these old SOHC's.
Any pics of your project? Are you restoring to original or chopping/caffeinating it?