Proflow Cylinder Heads, SuperMax 360 CNC, Aluminium, BB Chevrolet, Assembled

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Proflow does not sacrifice quality for a low price–you get both with our aluminium cylinder heads. The lightweight heads are cast from A-356 aluminium alloy with a large choice of engine, for SB & BB Chevrolet, LS Chev Holden Ford SB 289-351W, 302, 351 Cleveland 2V & 3V & BB FE, and Chrysler SB & BB. They have phosphorous bronze valve guides, and ductile iron valve seats for use with unleaded gas. They’re also end-milled and drilled for accessories. The fully assembled heads have stainless steel valves, high performance valve springs, 7 degree valve locks, rocker arm studs, and guideplates.

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This BBC cylinder head is recommended for agressive street or street/strip applications with displacements up to 540 cubic inches, operating at or below 6800 RPM. 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift.

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Material	A356.2 Aluminum
Intake Port Volume	360cc
Intake seat size	2.3
Exhaust seat size	1.88
Intake Port Dimension	2.515″H x 1.780″W x 11/32 Radius
Intake Port Location	Stock
Exhaust Port Volume	135cc
Exhaust Port Dimension	1.780″H x 2.025″ W
Exhaust Port Location	.375″ Raised
Combustion Chamber Size	121cc
Valve Cover Bolt Pattern	Perimeter Bolt
Valve Angle	24°/4° Int, 15°/4° Exh
Valve Spring Pocket Diameter	1.725″ O.D
Max Valve Spring Pocket Machining	1.750″ O.D
Deck Thickness	.750″
Minimum Bore Diameter	4.250″
Flat Mill	.006″ per cc/ Maximum 114cc
Angle Mill	.009″ per cc/Maximum 104cc _x000D_
Note:Angle mills might require a .120″ Thick intake gasket. _x000D_
Minimum Cross Sectional Area	3.435 sq. in.
Spark Plug Dimensions	14mm x .750″ w/Gasket Seat
Intake Valve Seat Machine Style:	5-angle
11/32″ Intake Valve, 2.300″ x5.500″ O.A.L
11/32″ Tulip Exhaust Valve, 1.880″ x 5.450″ O.A.L
Racing Spring #1224 1.625 O.D. Solid Roller, 275lbs on seat, .850 Maximum Lift, Max RPM 7400-7600
10° Titanium Retainers 1.490″ O.D x 1.180″ I.D x .765″ I.D
10° 11/32″ Valve Locks with lashcap recess
ARP 7/16″ Rocker Exhaust Studs
ARP 7/16″ Rocker Intake Studs
3/8″ Guide Plates
11/32″ Viton Valve Seals
Hardened Spring Cup 1.740″ O.D / 1.650″ I.D
Intake Valve Seats 2.450″ O.D x 2.000″ I.D x .375″ Deep
Exhaust Valve Seats 2.000″ O.D x 1.580″ I.D x .375″ Deep
11/32″ Intake Bronze Valve Guides .502″ O.D x 2.10″ O.A.L
11/32″ Exhaust Bronze Valve Guides .502″ O.D x 2.25″ O.A.L

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Recommended Components:
Intake Port Gasket	(.120″ Thick)
Intake Port Gasket	(.060″ Thick)
Important: Do not port match your intake manifold to Fel-Pro gasket as it does not precisely fit the heads.
Exhaust Port Gasket
Head Gasket, Fel-Pro #1047 (Mark V and VI)
Head Gasket,, Fel-Pro #1017-1 (Mark IV)
Head Bolts, ARP 135-3703 (Mark IV)
Head Bolts, ARP 135-3707 (Mark V)
Head Studs, ARP 235-4713
Head Bolt Washers, Manley
Stud Girdle
7/16 Stud Mount Rocker Arms – 1.7 Ratio (For Optimized Geometry)
1.7 Shaft Mount Rocker Arms T&D
Suggested Manifold	Victor Jr
Suggested Manifold	Super Victor
Spark Plug Starting Range	Pump Gas 3924 / Race Gas 3922

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