THH is known to racemize fairly rapidly although I don't know if the racemization rate has been studied. Would you plan on separating the (+) and (-) enantiomers? It would be worth finding out about the racemization rate lest the project turned out to be something of a waste of effort, at least with respect to discerning a difference in subjective effects between the two enantiomers. Of course, doing the science itself of resolving THH would not be a waste of time at all. Sounds like a great project.
It's very unlikely that the difference in subjective effects that you experienced is down to the racemic THH, versus someone else having had a product with a significant enantiomeric excess one way or the other - although you could check whether the individual enantiomers of THH are available commercially. Asymmetric synthesis would be possible as well, but again the question of racemization comes into play.
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli