seatbelt swap?

It shouldn't be difficult to do, but from my understanding it is not legal to go backwards on safety equipment. If it didn't come with seat belts (or shoulder belts, or turn signals, or third break light, etc.) you don't have to add them, but if it did, it's illegal to remove them. All state/local laws are a little differant, but I think this is universal.

The next question is, is it worth it? The shoulder belts are there for a reason. Maybe I'm just getting too old, but If I'm in a collision, I don't want my head/upper body slammed into the dash. I try to encourage people to swap in newer, retractable 3-point belts. If you are willing to put in a sub and new stereo, why not something that could save your life? Sorry about the rant, this is one of my "trigger" issues. I'd never tell anyone how to build their car, I just don't want to see anyone hurt or killed if it is avoidable.