I would suggest the Noonan or the $95 Wildkart brackets. The first two are designed to mount to holes in the lower steering shaft support (triangular piece welded to front hoop). OTK uses a stamped plate rather than two tubes. If you try to mount either, there could be a chance the pedals would slide forward on the tubes, but I have no personal experience with any of them. From the pics, it looks like the less expensive brackets from Wildkart bolt up front to the old pedal points and to the floor pan at the back. That should keep them in place with one horizontal and one vertical mounting point (no twisting or rotating under load).