61029 Features:

• For hydraulic flat tappet camshaft applications
• Refined bowl blending for improved flow output
• Compatible with factory-style mechanical fuel pumps
• Spark plug location angle is moved slightly towards the exhaust valve for better combustion
• Extra material is added above the intake port for, if necessary, machine work

Technical Specifications:

• Guide Plate Material: Hardened Steel
• Seat Angle: 60-degree Exhaust/Intake
• Deck Thickness: 0.625 in.
• Intake Runner Volume: 218cc
• Pushrod Diameter: 0.375 in. (suggested)
• Rocker Stud Diameter: 0.4375 in.
• Valve Angle: 6-degree
• Valve Spring Diameter: 1.105 in.
• Valve Stem Diameter: 0.3438 in.
• Non-CNC-Ported

Notes:

• Intended for installation on 1965-1976 Oldsmobile 400/425/455 ci big block engines with a deck height of 10.625 in.
• COmpatible with Oldsmobile small block engines, however, the 77cc chamber size will lower compression and is not ideal for performance
• 61025 supersedes 60519 Oldsmobile Cylinder Head

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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