4 point harness

I've heard this even though I've seen MANY harnesses attached to the floor.

Just because it's done,, doesn't make it safe.

Here's a new question. Is there a roll cage that leaves the back seats intact and easy to sit in? As I do carry more than one passenger at a time on occasion.

I think there are roll bars that bolt in, I don't know how safe/solid they would be. Problem is, you still have to deal with the cross bar, which can be removable, but IMO, would be a pain in the keester to do and undo that and the shoulder straps every time someone gets in or out.

Then there is the seat itself. Do your seats have the slots for shoulder belts? They really need to be there in order to complete the entire package.