well, even being completely tonedeaf, i was completely astounded with the difference in my Epi LP (got Black Dog bridge, Mississippi Queen neck)
but considering just how bad the original pickups were, even Seymour Duncans wouldv'e sounded better ..... ish :D
just as long as you have the exact tone of your guitar in your head before you plug in with BKPs, then you won't believe it's the same guitar
:D
(and yeh, constant Led Zep playing, with powerchords a-plenty :D:D)