The Buick Grand National has long held a special status ... Over 400 HP And Shows Retro Package For Z This powerhouse of an engine features two 62 mm turbochargers, a billet crankshaft, and ...
But the engine, which was built by Duttweiller Performance ... CARS AND TRUCKS LEFT That’s a fair bit more than the stock Grand National’s 245 hp, which was a lot in its day.