Not the Stynker; the problems with wheelies remain, and if you're going to put up with their shortcomings, you ought to at least be able to ford the first river you come to rather than stopping at every blue line on a map. Okay if you're in a desert or arctic environment, but elsewhere, not so much.
As for the MTLV, that's a little closer. But more like:
M113 105mm assault gun proposal from 1977 by Krauss Maffei and Rheinmetall a sort of "StuG-113" if you like....
Length with tube: 6.04m
Width: 2.91m
Height, hull: 1.76m
Height, commander's cupola: 1.92m
Crew: Commander, Loader and Driver/Gunner
Ammunition: 42 rounds
Loaded weight: approx 14,000kg
Or, speaking of the Sheridan and MTLV: The Australians used a M113A1 variant in Vietnam that sported a M551 turret, though they thought that the automotive/mine damage problems with the hull and chassis of the 551 made it unsuitable for their way of doing things. But an M551 turret on the body of an M2/M3 Bradley? Hmmmm.
Or, if you like a conventional gun: How about one of those rapid-firing 76mm guns the Navy uses atop a Brad, either shoehorned into a M551 turret, or maybe in an overgrown CROWS mount....