Go to Electrical updates/upgrades List

Anything you can do to remove load from the factory harness is a good thing. Relays work on a lot of items and likely won't tax the bulkhead/charge circuit when the car is running. With these cars and the way the OEM charging system is wired, there is no perfect place to pull power for all operating/non-operating conditions.

Headlights, AC compressor, power windows, power top pump, fuel pumps, fans, blower motor (high setting) all benefit from clean power off the OEM path.

Don't use junk products, Tyco/Bosch/TE relays only, no chinese stuff. Failure rates on Chinese relays is not great. The good TE relays for a headlight setup from Moser are about $14 each now. I sell the component relay kits without wire for the self build type too.

#1 deal, get an alternator with sufficient output to power everything at idle.