A good method that costs very little & works well is white touch-up paint.

Finish your initial torque & then put a drop of paint on each bolt head facing the intake.
USE a breaker bar!
Then turn each bolt 1/4 turn & all paint dots will face forward.
Then turn each bolt 1/4 turn again & all paint dots will point to the exhaust.
That works well with cars that require a 90deg angle of rotation.

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