We just bought a 2009 Ford f150 extended cab truck a couple of months ago! When we bought the truck our sons chicco key fit 30 fit perfect but it is now time to switch him to a bigger seat. I did not think this was going to be a problem until I started researching seats and realized that a convertible seat takes up more room and people seem to have problems with fitting them! Does anyone have experience with a convertible car seat in an extended cab truck, what car seat fit best, and is this safe?