Which Graco car seat fits best in a smaller classic saloon?

[benjaminevans]

I drive a 1970s saloon that I take to local club meets around Burlington, and I'm now shopping for an infant car seat for my first child. The rear bench is fairly flat and the lap belts are original, so I'm unsure how well a modern Graco seat will sit without wobble. I came across this third-party comparison online: Best Graco Car Seat of 2026. It lists several models, but I can't tell which base would work with older belts or whether any of them need a shoulder belt I don't have. My main worry is fit and stability rather than price. Has anyone here fitted a Graco infant seat into a classic car with lap-only belts? Which model gave you the least movement, and did you need any extra bracket or padding?

 

[saleen 192]

In the UK child seats have iso fittings modern cars have iso fitting old cars don't so iso fitting child seat won't work unless they have a lap belt function built into them. Good luck with working this problem out