Thanks Tonemonkey! So my strat had leftover pots from '74.. :)
I was (and still am) planning to sell this strat, but then I plugged it in and played it and compared it to the partscasters I'd put together (one with Fat 50's and one with CS 54 pickups), and one thing I noticed right away was the real deal '75 strat had a much more airy and glassy tone. Might be due to the lighter strings (I use 11's, my friend restrung it with what felt like 10's), but man... I told my wife I wasn't expecting to hear such a difference in tone, but then I guess there's a reason people pay what they pay for the older guitars. The strats I'd put together had a fatter sound, which I do like, but when I play the '75, I think I hear what a strat is supposed to sound like.