Im 6'3" and most of my height comes from my legs so headroom isnt an issue i just need more leg room in my bird. I have been looking at the reproduction seat extenders that give 2 more inches of room but I would like to have more room almost to where the seatback is touching the back seat. Has anyone done this and maybe have some tips? I live in LA does anyone around my area maybe have references to some shops if i do need to have something fabricated?