It probably was feasible. Paper studies were carried out in late 1942/ early 1943 on fitting either a 17pdr or 3.7 inch AA gun to what was then called the 25-pounder Ram SP for use as a tank destroyer. The idea unfortunately died for lack of interest.
The history of the project will be found in my forthcoming "Secret Weapons of the Canadian Army" (
www.servicepub.ca).
Roger