Yeah baby! Love the look of a '54 Goldtop! Congratulations on a great score!
I did change the stock P90s in mine today for a set of Lollar 50s wind.........a noticeable improvement. I discovered Gibson uses the same pickup in both positions, neck and bridge, which explains why it's near impossible to balance them for volume. The body routs are quite shallow and to not allow for height adjustments.......both pickups are screwed down tight and that's it......Lollars too. However, the different windings of the Lollar neck v. bridge do allow for volume balancing with the pole screws. Much better.
The Lollar neck is warm and sweet without the overpowering mids of the Gibson, while the bridge is quite Tele-like but much bolder and not shrill and piercing. All in all, a tonal step up from the stock set......better balance in volume and tone.
Happy to hear about your experience with the Lollars!
I'm "never say never" on swapping mine out someday, but for sure will take time to get a real feeling for what I have before making a swap, especially as this is my first P90 guitar in my setup.