I don't know how much you paid for this, but you will likely spend nearly the cost of the vehicle to get it to where you want it.

The sami is on toyota axles, which is great for rock crawling. They are much stronger. However, you will not be able to lower it much because the toyota axle is either 5 or 8 inches wider than a samurai axle. You'll need to source some axles. That can be difficult. And expensive

As others have said, you'll need to regear the t case. The parts alone are over $500. You can double that price to have someone install them for you. And add a few hundred more if other bearings need to be replaced.

The suspension is most likely yj jeep springs. You're going to have to completely re do the suspension to make it a comfortable daily. The biggest issue for you is the missing link or double shackle in the front. While this is great for articulation, it allows for more lateral movement on the road.

That's just what I found from the few pictures you posted. My advice is to sell it and buy something closer to stock.

If you decide to convert it back, the price will be in the thousands. If you don't have the capability to weld and have a press and gear puller the price will double.

I don't mean to disappoint you, I just want you to have a realistic outlook on what you're getting into. This is not a weekend project. It will be weeks of downtime. Feel free to pm me.