The 2 big coil spring you see are to make the gearstick centre sprung ie between 3rd and 4th. SOme =boxes have bigger springs than others but that's another issue.
Reverse has a little plunger at the LHS of the selector housing which in turn operates the pushrod for the reversing light. Is this goosed? Do your reversing lights work? stay on all the time maybe?
There is an adjustment of the clearance to this plunger when in 1st gear that is made using shims under the housing, it allows just enough clearence without rattling.