We import Valenti products directly from Valenti of Japan. I've seen a lot of posts about the tail lamps and headlamps, but not much mention of Valenti's other products for the 86 cars. I thought I'd share some photos.
Interior Lamp Kit
This kit includes LED panels for the dome lamp, trunk lamp, and rear license plate (tag) lamps.

That's the kit.
There's also an optional lens and reflector kit that you can add for the dome lamp. Since the original lens is designed for a halogen bulb, the Valenti lens/reflector combo help diffuse the LED light more evenly, and it looks better.

Lens/reflector option
To install the dome lamp, you pry the lens off the fixture using a little screwdriver. Remove the bulb and install the Valenti bulb adapter, then stick the LED panel in place. You can see it comes with some little foam blocks to support the flat panel.

Installation in progress

Install done (factory lens)
Looks good! You can see how the factory lens has provision for a type of bulb that's no longer there, though.
Here I removed the factory lens, and installed the Valenti reflector. I dialed down the exposure because otherwise it would just be a blaze of light.

Reflector installed (no lens)

Lens installed
The trunk lamp installs really easily.

Valenti LED trunk lamp before and after
The tag lights are a little bit more work. You have to remove the trunk lid liner, if you have one, and then get at the bulb housings from inside the trunk lid. Then you have to position the lamp units inside the housing, and get them stuck in place. It's kind of a ship-in-a-bottle operation. Once installed they look something like this:

Valenti tag lamps installed

Tag lamp on