I want to beef up my old Epi Les Paul Standard a bit and thought about replacing the stock pickups with AHB-1 Blackouts.

I tried to google the answer to my question, but it just left me confused. I will bring my guitar to a shop anyway to let them install the pickups, but the question is: is the Les Paul built for active pickups or will they have to do extensive work on the guitar itself before they can install them?

Thanks in advance for any answers.
All it needs is rewiring. The battery can and often does just go in the control cavity.
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Quote by Anonden
You CAN play anything with anything....but some guitars sound right for some things, and not for others. Single coils sound retarded for metal, though those who are apeshit about harpsichord probably beg to differ.
I've got them on my S470 and the battery actually fits in the control cavity, so I think you won't have any problem fitting it on a LP.
It should fit no problem. If your feeling especially handy you can mount an easy access battery hatch in the control cavity cover.