I'm building a Fury:
There's a long thread in the Motorsports Forum with lots of details.
I'm not sure the Tilton floor mount pedals would work well with a rally car. I believe floor hinged pedals work best ergonomically when your butt is very close to the floor and your legs are relatively straight. For a production car, top hinged pedals are a better choice. I also looked at the AP pedals--they come with a gas pedal, too--but $1200 is a bit steep. The Tiltons are $225, or $360 complete with MCs and reservoirs.