Anyone have experience registering a conversion in KS to be street legal?

I'm at the point where I'll be registering my conversion this year hopefully. That said, I'm going to have the basics, lights, steering, brakes, go forward...

But I'm realizing the condition of my target car -- I'm basically going to rewire the whole thing and I don't think I'll be able to make the airbags work because a lot of the impact sensors are missing, corroded or just in terrible shape (at least that's what I think the extra bits of e-waste are). The donor being a 94 I doubt I could find them either.

Do I need to have all the safety gear that the car was sold with, or just prove the basics work? I know the basics, mirrors, lights etc but some of the fluff I don't think I can do.