Does anyone know how to move the driver's seat back 3 more inches? Does a kit exist to do this? Has anyone ever done this?

 

you too tall? That sucks, I'm 6'2 and mine is back about as far as it'll go.

 

I'm 6'4 and I fit just right

 

You probably can't move it back 3", the rails end pretty close to the back of the seat well already.

 

I'm 6'-3 1/2". I put 3/4" spacers under the front seat mounts that rocked the lower seat cushion angle up in the front (but not the back), thus increasing the thigh support, and added an inflatable lumbar bladder under the leather seat cover.

ALL the difference in the world in a stock seat.