I have one in my 69 Camaro with 4,000 + miles of happy driving. It is very precise and clean feeling. No bump steer issues. I built custom headers with my LS1 and it worked out fine. It clears the oil pan no problem (custom pan mods for the LS1 application from a standard LS1 F body pan). A friend of mine that professionaly builds tube chassis race cars checked it out. He was pleased with how well it sat in the frame and noted the geometry is correct for the application. Bump steer can happen for a variety of reasons not all blamed on the rack as much as how the tierod ends are set to the spindle mount.
I cleaned up the coupler to the steering shaft after mounting a 1981 Vette tilt/tele column. This really cleaned things up.
Notice in this last photo how clean the firewall is where I was able to slide the steering column back behind the wall and extend just the shaft to mate into the flaming river universal joint.