I think yearone and other companies of the like sell the generic school bus looking seat belts for like 50 bucks a pair. Bolt them down and tuck the ugly things under the back, when the kids want a ride pull them out and theyre nice and safe, probably safer than using the old belts anyway. Under a real impact they might come unbuckled as far as i'm concerned, I don't really trust mine. I'm 18 so when my friend get in the car they think its awesome because theres only a lap belt and its like an air plane, except the girls. They all ask for a shoulder belt! BTW Ive only got two belts in the back too, '67 Satellite. Ive seen cars with three though.