This code-YE 455 H.O. consists of a No. 485428 block with 4.15-inch bore and four-bolt main-caps that retain a 4.21-inch-stroke nodular-iron crankshaft. A No. 068 camshaft with 212/225 degrees of 0.050-inch duration and 0.410-inch lift controls valve action. A No. 7041270 Rochester Quadrajet carburetor with increased airflow capacity sits atop the No. 483674 cast-aluminum intake manifold with separate exhaust crossover. Normally painted engine color on the 455 H.O., this particular intake manifold was left natural for appearance sake.