That guitar sounds pretty damn good on that recording I wouldnt change a thing on it.. i'd just keep it the way it is.. and admire it for what it has to offer.
Hmm, it's difficult, just wondering if it couldn't sound even better.
Maybe I'll go and replace pots/switches with better ones and shield the guitar as per previous recommendation and then see whether there's any desire left to change.
By the way, it has the stock Tokais in middle and neck but I replaced the bridge with a DiMarzio HS2 in the early 90s, actually this gives a pretty versatile tonal spectrum.
BKP don't do any humbucker-single-coils, do they?