Here is the block off plate, gasket, and attachment screws
(I have subsequently moved the channel between the bores to the other side of the screw holes)
Other side of the plate
Assembled, ready for installation
Hold plate in position and mark where the mounting holes are with a fine point Sharpi
Note: To get correct positioning, move 1st/2nd shift rod into second gear where it protrudes and position the plate over the shift rod.
Mounting holes marked
Center punch mounting hole location
Drill mounting holes. 0.159 for #10-32 screws
Tap mounting holes and mount plate
a Dremel tool
Bell housing protrusion
Bell housing protrusion ground down to clear plate
(Yellow arrow points to where the hole was drilled and taped for the vent tube)
The pipe coming out the side is the added reverse backup light switch. There is a rod inside the pipe that contacts the reverse shift rod and extends out to the push button switch mounted on the end of the pipe.