If you want to sell the original pickups - there will be no end of takers!
Let me know how you like them. I have the 85 and 89 in another guitar and have considered moving them to my Axis since I don't play that other guitar anymore =D.
Have you considered trying DiMarzio's D-Activator pickups? They built them to be passives that react, feel and have the output of EMGs, and every EMG player I've heard of who's tried them has really loved them. Being DiMarzios, they'd be an exact drop in, and at the very least would let you know if you like that style of pickup in the guitar with no permanent modifications.
Oops actually I have the 81 & 85. Talk about high output.
What's the 89?