but they're not really able to run at high engine speeds like SOHC or DOHC motors. Here's how an overhead valve engine works, according to Cars.com: [T]he valves, which open and close to let the ...
The standard ‘67 Firebird engine was a 230 cubic inch (3.8 Liters) inline six-cylinder with a single overhead cam (SOHC) putting out 165 HP with a single one-barrel carburetor. The upgraded ...