Which brace is driver side and which is Passenger?

Mahalo Bill! I plan on dropping the engine and tranny in this Saturday. Just want to get all my ducks in a row. Got the 66 FSM, Mopar small block rebuild book, rebuilt 273, 904, PS pump, alt, steering gear, Doug's headers (my biggest worry). Several friends and warm beer.

Warm Beer? Yeah none of them "friends" can drink until the engine is secure!!!!

Mahalo