Dutchboys Hotrods rebuilt a 1987 Buick Grand National with a twin-turbo 1,400-hp LS7 and custom PPF, creating the most ...
It was no slouch, though. The 3.5-liter EcoBoost V6 was nearly the same engine found in the Le Mans class-winning racecar from 2016, and in road-going form, it produced 660 horsepower and 550 ...