http://www.motoiq.com/magazine_artic...p-headers.aspx
Hooker is making headers for the s13/s14 swaps now. I wonder how close it is on the FR-S/BRZ
I'd just swap a Cosworth and keep the low center of gravity. By the time you find a LS* motor and get it up and running. Your going to have that much into it anyways.