Leaving room for small holes or tears in boxes, and original plastic wrapped around intake manifold in box possibly being torn. Brand new, never used otherwise. Engine Block Deck Height: Standard deck. Basic Operating RPM Range: 1,500-6,500.Intake Manifold Height: 4.720 in. Notes: Not for 1987 and later cast iron heads, but will fit Chevy cast iron Bowtie heads. Will not clear stock Corvette hood. No provision for exhaust-heated chokes. When using a Holley Double-Pumper series carburetor a low profile vacuum fitting EDL-8096 must be used.