Could the Soviet Union respond if the US Navy built the full proposed Cold War destroyer and frigate programmes?
Short answerNot symmetrically; a 340-plus escort fleet would be too large for the Soviet Union to match hull for hull.
NotesThe hypothetical programme combines 12 Kidd-class destroyers, 88 Spruance-class destroyers, and 243 frigates, giving 343 escorts. The frigate list includes Oliver Hazard Perry, Knox, Brooke, Garcia, and Bronstein classes. A fleet of that scale is judged beyond the Soviet Union's ability to match.