Thanks for keeping it chill.

I'm not sure on the differences between carb cleaner & brake cleaner, but some small carburetor manufacturers do not recomend the use of carb spray because they claim it is too harsh. Some companies such as Tillotson & Walbro recomend brake cleaner. But for my Holley's & Quadrajet's, nothing beats good ol Berrymans Chem Dip.

As for WD-40? Try Water Displacement... 40th formulation.