Distance between lower two screw holes of base: 1- 1/8 "
Between top and bottom screw holes of base: 5-1/4"
From bushing to joint: 2-3/8"
Not sure how to size bushing.
Paul from SWISCO responded:
August 5, 2016
Thanks for contacting us. Please see our 39-025 operator. This looks like it could be a good match. Look over our information and measurements to confirm.