Hi! I've recently purchased a 52' telecaster reissue usa from 2000. How do I know if the pu are the stock ones? What are they called? Alnico III's or I'm wrong? Is it a crime if I want to swap in some Rio Grandes? Any suggestion about other pickups will be appreciated, I'd like to achieve something like a Fat twangy sound even in the bridge pickup, wich is too harsh for me. Thank you very much guys!