LED bulbs

You can find all the bulb type in your manual
That number you can use for cross reference for the led,s on e bay I change all of mine plug and play big difference

 

I have a 1978 308:
Keep the incandescent light bulb for the alternator low voltage warning. A diode is inline to bulb. When the battery output is more than the alternator output the bulb illuminates. (Should be still valid for 328 based on wiring diagram)

I had to purchase a LED flasher relay 3 prong and add a ground connection to my relay board for the additional prong on the flasher relay.
The bimetallic type would not work due to lower current draw.

328 uses a three prong flasher per wiring diagram. It would need a LED flasher module for outside LED turn signal lights and the turn signal lights in the dash.

I purchased most of my LEDs from SuperbrightLED website.

 

https://www.ferrarichat.com/forum/posts/147633922/

Note: You have a 3 prong incandescent flasher relay. You will need to replace with a 3 prong LED flasher relay. Amazon has them. ~ $12. Purchase the Amber LEDs for Yellow turn signals, and Red LEDs for the rear driving and brake lights.

https://www.amazon.com/gp/product/B07KFT7CNZ/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

 

https://www.ferrarichat.com/forum/threads/what-have-you-done-to-your-ferrari-today.436876/page-110#post-147672175