On November 12, 1994, at 0845 eastern standard time, a Beech A23, N3584R, lost total engine power during cruise flight. A forced landing was made on a road near Campbellsville, Kentucky. The pilot and passenger were not injured. The airplane was substantially damaged. Visual meteorological conditions prevailed. The instrument flight rules flight departed Indianapolis, Indiana, and was destined for Chattanooga, Tennessee. The flight was operated under 14 CFR Part 91. According to a Federal Aviation Administration Inspector, the pilot reported that while in cruise flight the airplane engine lost total power and despite all emergency procedures accomplished, it would not restart. The pilot reported that he tried to land the airplane at a nearby airport but it did not have enough altitude or airspeed to make the airport. The pilot said he landed the airplane on a road and had to turn it off the road to avoid a car. He stated that when the airplane departed the road, the left main gear collapsed damaging the fuselage, stabilizer, and left wing. According to the passenger, who was also the owner of the airplane, she and the pilot both did a preflight prior to departure. She stated that both fuel tanks were full and there was no evidence of fuel leakage prior to departure. The passenger stated that the engine quit about two hours after departure. She stated the fuel selector was selected to the left tank the entire flight. She said she did not notice what the fuel gauges were reading during the flight. Postaccident examination of the fuel system revealed no anomalies with the fuel pump and fuel gauges. The fuel selector was positioned on the left fuel tank. No fuel leaks were found throughout the system. The left fuel tank had an undetermined amount of fuel in it and the right fuel tank was empty. The fuel selector assembly was tested and the fuel selector handle was found to be offset 90 degrees from the attached fuel selector valve. The fuel selector handle and valve should be aligned. When the fuel selector handle was positioned on the left tank, the fuel selector valve was selected to the right fuel tank. When the fuel selector handle was positioned on the right tank, the fuel selector valve was positioned in the "OFF" position. The pin that aligns the fuel selector handle and valve was missing. According to the Beech A23 Pilot Operating Handbook (POH), "A fuel return line from the engine-driven fuel pump returns approximately 3 to 6 gallons of fuel per hour to the left tank when the engine is operating at 75 % power or less." Any excessive fuel in a fuel tank will be drained overboard through the fuel vent line. The airplane had a fuel capacity of about 60 gallons (29.9 gallon capacity each fuel tank.) According to the POH, a maximum fuel flow for the airplane is 9.3 gallons per hour. According to the airplane's log books, the airframe and engine had received an annual inspection on November 9, 1994, three days prior to the accident. Since the annual inspection, the airplane had been flown about 2 1/2 hours. Examination of the annual inspection entry in the airplane's log book showed the mechanic had documented the annual inspection and near the end of the entry stated "...freed up the fuel selector valve...." During an interview with an FAA Safety Inspector, the mechanic stated that he aligned the fuel selector handle and valve using the alignment pin. He stated that after he re-installed the fuel selector, he tested its operation by verifying the operation of each position and by complying with Airworthiness Directive 75- 01-04 (See attached AD).