The 326 looked much like the 389, only with smaller pistons and a light crankshaft. The 326 was the inaugural base engine for the Pontiac Firebird's debut, supplying it with 250 horsepower ...
A Step-By-Step Guide Although the 389 and the tri-power setup shown above made the GTO a legend, the engine and tri-power option had been in Pontiac's lineup since 1959, when Pontiac increased the ...