I have Corbeau seats in my SC. They are lightweight and recline so the back seats are usable. I bought them used off of Pelican back in 2009.
They are a bit snug. I am 5'7" and my weight varies between 170-180.
My shifter setup is a mix of bits and pieces but I don't have any issues with hitting the seats/legs in any gears.
Here's a pic from a thread I started after dying them black. They were faded from the sun.
http://forums.pelicanparts.com/porsche-911-technical-forum/502914-fabric-dye-results.html