I don't know if the floor pan where the seats mount is the same height on the left hand side of the car as it is on the right. The mechanism for the 8 way seat may be taller (due to being able to move up & down), and this may put the passenger higher up than the driver - this links into my first sentence stating that the floor pans may be different - I know in my Mustang the passenger floor pan where the seat mounted was higher than the drivers side floor pan. So you may be screwing 'normal' proportioned people who sit in the passenger seat if you put the 8 way system on.