The following pertains toa single 4bbl carburetor.
There may not be a standard assembly that meets all the size requirements, but you should be able to order individual pieces.
Element: E-3740 (14" diameter x 2 5/16" high)
7/8" drop base : 97003383
14" XTream top
You may have to shim the base up a bit to avoid interference with the choke plate. Unfortunately, the 3" element with the 1.25" drop is usually on a collision course with the hood.