MEMPHIS, Michigan — The stick-shift Acura Integra is a treat. On a lonely two-lane Armada Ridge Road in Macomb County, I toggled SPORT mode and reached for the shifter. The engine rev-matched the shift — BLAT! — making for a buttery smooth throw. Quickly back on throttle, I revved hard to the 6,500 RPM redline. Third gear. Fourth gear. “Chicane” LED running-lights aglow, the Angel Blue Integra cut through the gray landscape like a scythe. Fast, …