Respectfully, this should be an easy decision.
Problems related to smoke oil pumps continuing to pump oil after an accident have plagued the air show business for many years, resulting in injuries and fatalities.
Demonstrating our industry’s capacity to respond quickly to a clearly identified problem, the gear heads in our business got together and came up with multiple solutions to this nagging problem. These solutions have been demonstrated to be simple, inexpensive and effective. In each case, they shut off the smoke oil pump in the event that engine power is lost. Details on the two simplest and least expensive solutions can be found here and here.
Please, don’t fall victim to a known hazard for which our industry has already identified multiple, simple, inexpensive solutions. Find time to read about these solutions and then install one of them in your aircraft.