I have an older truck ('99) without the newer mandated kids car seat hooks in the backseat, so I have to use the shoulder seat belts. My wife is extremely paranoid and worried that they aren't getting the seats tight enough. They seem pretty damn tight to me, but admittedly they aren't as tight as the ones in her newer car with the hooks. Do any of you guys have experience with newer car seats installed in older cars/trucks that can share experience? Mainly I just need some expectation management I guess. I just don't know how tight they are supposed to be.