This 1986 Buick Grand National is finished in black over a two-tone interior, and during prior ownership a turbocharged and intercooled 6.2-liter LS3 V8 was installed and paired with a Tremec TR6060 six-speed manual transmission. Additional modifications include a Fuel Air Spark Technology fuel-injection system, a Turbonetics wastegate and blow-off valve, Hotchkis suspension components, Strange Engineering disc brakes, widened rear wheels, window tinting, a Hurst shifter, and leather interior accents. It was purchased by the current owner…