There are a lot of benefits for a tall person to sit lower in a car: Visibility is better, airbags line up better, you can sit your chair seat up as much as you want...
Here's how to modify your car seat:
http://www.talladaptations.com/2013/12/car-seat-modification-for-tall-people.html
Here's how to modify your car seat:
http://www.talladaptations.com/2013/12/car-seat-modification-for-tall-people.html