Instead of shortening the rear signal stalks I removed tehm altogether.
I cut two signal shaped holes into the back of the fender.
I then trimmed the tops of the signals a little, removed the stalks altogether and mounted them through
the fender using the existing hardware.
trimmed the "surf board" fender and used that to fabricate a cover for the whole thing, including the existing turn signal
holes. There is lots of clearance, and Ive never "bottomed out" against it.
I used crazy glue and drywall anchors to fasten the cover together.
Finally, I trimmed the license plate bracket in half and used the
two pieces to attach the license plate.
(note install may be different for model year 2000 and older models)