First thing I would do is install a Headlight Relay wire harness kit....
https://www.americanautowire.com/sho...ncer-relay-kit
This will get you a true 12v to the headlights..... and take the load off the factory headlight switch in the car....
From there..... you can then convert your bulbs to what you need...... Halogen , LED, etc - without fear of overloading the stock wiring....
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Troy
Rockaway NJ
67 GTO
400HO / TKX 3.27 1ST GEAR-.72OD / 3.36 POSI
HOTCHKIS/UMI/BILSTEIN