I believe I have found another difference in the 41/46/47. I recently bought a 47 project and found that the brake light switch is not on the master cylinder like the 41 but it is on the toe board. It is a switch activated by the upper brake pedal. Dave

1941 Chevy
"First rebuild - complete!"
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1941 GMC resting peacefully
1946/1947 Chevy Street rod on s10 frame complete
1945 GMC panel truck in line for restoration
1941 Plymouth stock complete
1941 GMC COE in restoration process
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1941 Chevy Coe uncertain future resting now