Most Carver Bimini tops can be cut down, but not very much as a rule. You can cut the top down up to the first jaw slide, where room allows, which is usually only about an inch or so.
The exception is the Super Sport Bimini top and the 46" high Bimini top. The Super Sport top can be cut down from 35" to 30", and the 46" high Bimini can be cut down 10" for a final height of 36".
For information on cutting down your Carver Bimini top, view page 6 of these instructions.