Re: 1966 chevy truck spotlight install.
Next...mount your bracket firmly with the screws and install the pilot bushing( Picture 2..what my finger is touching)...and carefully with a 1/2 inch drill bit drill the hole ALL the way though...DON'T take the bracket off the drill the interior whole! The pilot bushing and bracket act as a guide. Install the gasket and bracket and your results are so! Picture 1. Picture 3 shows the drill.
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