Yep,
Baja + BG Flat 50s = "what was meant to be"
I did it to mine a couple of years back. I was looking for the "vintage tele" tone, though I didn't really know what it was at the time. I was aware that the bridge might be a meatier tone than what I had already.
I've never looked back since I put them in. My experience was that the BG Flat 50s manage to achieve what it felt like the stock pickups were only trying to do. In my hands they do give me that "little more personality or character" I was looking for.
Btw, I got into Roy Buchanan later, and a Baja with BG 50s still does it :D (don't forget your tone and volume controls, though, both guitar and amp).
Whatever you go for, if you want to keep the 4-way (YESS! with BG 50s) and S1 switch (up to you, I did), you need an extra/separate ground wire on the neck pickup's cover. I've always ordered them like that, but if you're buying from a shop you might have to put it on yourself or get a tech to do it.