What is the safety hazard associated with mismatching brake chambers (e.g., standard vs. long-stroke) on the same axle?

1. It will cause the engine governor to cut in too frequently
2. It causes unequal brake application forces and timings, leading to brake pull, jackknifing, or wheel lockup
3. It forces the safety valve on the wet tank to open at 100 psi
4. It prevents the driver from caging the spring brakes in an emergency