When I modded a Bronco, I put a cheapo generic lipstick Strat pickup in it - a bridge one so it was a bit beefier in the DC resistance department. Probably scored it off eBay. Sounded good to me.
Definitely heard of people using Hot (and Cool) Rails in Broncos. I don't think you can go wrong with either.
Can't remember if I changed the pots, sorry, it was many years ago.
The stock bridge is intonatable with patience, but not the best. Trouble is there is no direct swap that I know of. The bridge off the Squier Vista Series Musicmaster is close, but it is string through the body - I used this bridge to upgrade my Bronco but I had to drill my own holes in the back of the bridge for the strings to thread through top loaded.