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Best factory cast iron cylinder head, Chevy, Ford, Mopar?
With these rules, It appears that the only advantage will be in the cylinder head. These are rules for a NorthEast style Mod. Don't let the rules fool you, they are obviously making some power.
Thanks in advance for your input.
ENGINE RULES
5-2 ENGINE DISPLACEMENT Chevrolets 362 cubic inch max. Ford 362 cubic inch max. Mopar 360 cubic inch .030 max.
5-3 ENGINE BLOCK A: Block must be standard factory production or aftermarket with standard external measurements in all respects. B: Internal polishing, porting and/or relieving will not be permitted (except for oil return)
C: No aluminum blocks permitted.
5-4 CYLINDER HEADS A: Heads must be cast iron, stock production only. No aftermarket cylinder heads allowed. B: 2 valves per cylinder. C: No titanium valves or springs. Only steel springs allowed. D: No port matching or flow work permitted. E: 3 angle valve jobs are permitted. F: When cutting the valve angles no stone or grind marks are permitted above the bottom of the valve guide. G: All cutting in reference to the valve job and bowl area of the head must be centered off the centerline of the valve guide. H: Upon completion of the valve job the bowl area under the valve seat must be the same configuration as from the manufacture. Surfaces where the cutter or stone have touched must not be polished. I: All valves must be similar to OEM in application and construction. Stainless steel valves permitted with a minimum stem size of .304 allowed. J: Minimum 62cc combustion chamber. K: All work in the combustion area of the head must be off the centerline of the valve guide. No grinding or polishing allowed. L: Maximum valve size: Exhaust Intake Chevrolet 1.625 2.023 Ford Cleveland 1.656 2.046 Ford Windsor 1.5469 1.8437 Mopar 1.625 2.020.
5-5 CRANKSHAFT A: Only standard steel or cast iron production crankshafts permitted. If after market crankshafts are used, they must be identical in appearance and construction to an OEM crankshaft balancing is permitted. B: Counterweights must be the same shape, they may be polished but they cannot be knife edged, undercut or drilled to lighten the crankshaft. The rod bearing holes may be drilled. The main bearing holes may not be drilled. When weighing the crankshafts, the minimum weights listed below shall include the timing chain sprocket. The minimum crankshaft weight is 48 pounds. C: Only standard OEM steel type harmonic balancers allowed.
5-6 PISTONS A: Only flat top pistons permitted. No portion of any piston may extend above the block
B: Pistons must have a minimum of (3) ring grooves.
C: Piston rings must be in all (3) grooves. D: Only steel piston pins maintaining a minimum diameter of .927 allowed.
5-7 RODS A: Rods may be stock or forged steel, provided all measurements are identical for make and model of the engine. This includes journal size. B: Maximum rod length allowed 6.250 C: Only stock rods may be polished. D: Rods must be solid with no holes.
5-8 CAMSHAFT A: Only steel camshafts permitted. B: No belt drive camshafts permitted.
5-9 LIFTERS A: Solid or hydraulic steel lifters permitted. B: Lifter diameter and height must be standard for make of engine being used. C: No roller or mushroom type lifters allowed.
5-10 ROCKER ARMS A: Roller rocker arms permitted.
B: Rocker arms must be independent stud type. C: Stud girdles are permitted.
5-11 INTAKE MANIFOLD Listed below are the only eligible intake manifolds for competition. These manifolds must remain as manufactured. No port matching or flow work permitted. Manifolds must not be painted. The following Edelbrock Performer series intake manifolds are allowed. A: Chevrolet – # 2101 B: Chrysler – # 2176 C: Ford -Cleveland 48L heads – # 2665 Cleveland 28L heads – # 2750 Windsor – # 2181.
5-12 CARBURETOR A: The only approved carburetors are: Holley 4150 Series, model number 6895, and 4150HP Series, list number 80507. B: Choke horn (Model Number 6895) may be removed with a square cut, no taper or bevel, but may not be cut into the body of the carburetor. The air cleaner gasket ring must remain standard. C: All parts not covered in the preceding rework guidelines must remain stock, this includes metering blocks and fuel bowls. D: All boosters must be safety wired.
Thanks in advance for your input.
ENGINE RULES
5-2 ENGINE DISPLACEMENT Chevrolets 362 cubic inch max. Ford 362 cubic inch max. Mopar 360 cubic inch .030 max.
5-3 ENGINE BLOCK A: Block must be standard factory production or aftermarket with standard external measurements in all respects. B: Internal polishing, porting and/or relieving will not be permitted (except for oil return)
C: No aluminum blocks permitted.
5-4 CYLINDER HEADS A: Heads must be cast iron, stock production only. No aftermarket cylinder heads allowed. B: 2 valves per cylinder. C: No titanium valves or springs. Only steel springs allowed. D: No port matching or flow work permitted. E: 3 angle valve jobs are permitted. F: When cutting the valve angles no stone or grind marks are permitted above the bottom of the valve guide. G: All cutting in reference to the valve job and bowl area of the head must be centered off the centerline of the valve guide. H: Upon completion of the valve job the bowl area under the valve seat must be the same configuration as from the manufacture. Surfaces where the cutter or stone have touched must not be polished. I: All valves must be similar to OEM in application and construction. Stainless steel valves permitted with a minimum stem size of .304 allowed. J: Minimum 62cc combustion chamber. K: All work in the combustion area of the head must be off the centerline of the valve guide. No grinding or polishing allowed. L: Maximum valve size: Exhaust Intake Chevrolet 1.625 2.023 Ford Cleveland 1.656 2.046 Ford Windsor 1.5469 1.8437 Mopar 1.625 2.020.
5-5 CRANKSHAFT A: Only standard steel or cast iron production crankshafts permitted. If after market crankshafts are used, they must be identical in appearance and construction to an OEM crankshaft balancing is permitted. B: Counterweights must be the same shape, they may be polished but they cannot be knife edged, undercut or drilled to lighten the crankshaft. The rod bearing holes may be drilled. The main bearing holes may not be drilled. When weighing the crankshafts, the minimum weights listed below shall include the timing chain sprocket. The minimum crankshaft weight is 48 pounds. C: Only standard OEM steel type harmonic balancers allowed.
5-6 PISTONS A: Only flat top pistons permitted. No portion of any piston may extend above the block
B: Pistons must have a minimum of (3) ring grooves.
C: Piston rings must be in all (3) grooves. D: Only steel piston pins maintaining a minimum diameter of .927 allowed.
5-7 RODS A: Rods may be stock or forged steel, provided all measurements are identical for make and model of the engine. This includes journal size. B: Maximum rod length allowed 6.250 C: Only stock rods may be polished. D: Rods must be solid with no holes.
5-8 CAMSHAFT A: Only steel camshafts permitted. B: No belt drive camshafts permitted.
5-9 LIFTERS A: Solid or hydraulic steel lifters permitted. B: Lifter diameter and height must be standard for make of engine being used. C: No roller or mushroom type lifters allowed.
5-10 ROCKER ARMS A: Roller rocker arms permitted.
B: Rocker arms must be independent stud type. C: Stud girdles are permitted.
5-11 INTAKE MANIFOLD Listed below are the only eligible intake manifolds for competition. These manifolds must remain as manufactured. No port matching or flow work permitted. Manifolds must not be painted. The following Edelbrock Performer series intake manifolds are allowed. A: Chevrolet – # 2101 B: Chrysler – # 2176 C: Ford -Cleveland 48L heads – # 2665 Cleveland 28L heads – # 2750 Windsor – # 2181.
5-12 CARBURETOR A: The only approved carburetors are: Holley 4150 Series, model number 6895, and 4150HP Series, list number 80507. B: Choke horn (Model Number 6895) may be removed with a square cut, no taper or bevel, but may not be cut into the body of the carburetor. The air cleaner gasket ring must remain standard. C: All parts not covered in the preceding rework guidelines must remain stock, this includes metering blocks and fuel bowls. D: All boosters must be safety wired.
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