Nissan calls that the "Pedal and Steering Post Bracket", though most here call it the "pedal box"
46570-H1600 LHD ASSY-BRACKET PEDAL & STEERING POSTUnfortunately mounting the M/C on top of the bracket means you can't use the stock dash assembly. Do you think there is room beside the Bracket, i.e. next to where the flasher can is (on either side?)
