z-bar question

The big block and small block z bar are different. The small block piece is 7" long and both arms are straight. The big block piece has one straight arm and one that is, closest to the bell housing, curved. I haven't measured one so I don't know how long it is. The rod that runs from the pedal to the z bar has an offset around 1/2 to 3/4 where it comes through the firewall.
You can see a pic of the big block z-bar and the inner fender whell bracket in the tech articles on http://www.bigblockdart.com/techpages/4sptech.shtml