Cast-Iron Vortec Cylinder Head Assembly

P/N 19436449

- Completely assembled with 1.940"/1.500" valves - Uses bare head 12529093 - 64cc combustion chamber - Straight spark plugs - No heat risers - Requires Vortec-specific intake manifold - Camshafts with more than 0.475" lift require machining valve guide bosses and checking valve seal to valve spring retainer clearance - Can be machined for 2.020"/1.600" valves - Rocker arm studs can be pinned or drilled and tapped to 3/8" - Valve spring seat diameter is 1.280" - Casting number 10239906 or 12558062

This head is assembled with the following components:

• 10241743 Intake Valves
• 12550909 Exhaust valves
• 10212811 Valve Springs
• 24503856 Valve Locks
• 10241744 Valve Spring Retainer
• 10212810 Intake Seals
• 12564852 Exhaust Seals

Additional Required Components:

• 10105117 (2) Head Gaskets or
• 12557236 (2) Head Gaskets
• 10168525 (14) Bolts
• 10168526 (4) Bolts
• 10168527 (16) Bolts
• 19300749 Spark Plugs

Engine Application: 19258602, 19210009, 12499101, 19210007 and 19210008