Items You Need
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Chevy Big Block
Features:
- For 509 to 540ci engines operating below 6,500 rpm
- Intake Port Volume: 335cc
- Intake Port Dimension: 2.510 in. Height x 1.820 in. x 3/8 in. Radius
- Intake Port Location: Stock
- Exhaust Port Volume: 140cc
- Exhaust Port Dimension: 1.690 in. H x 1.900 in. W
- Exhaust Port Location: .357 in. Raised
- Valve Spring Pocket Diameter: 1.750 in. O.D
- Max Valve Spring Pocket Machining: 1.750 in. O.D
- Deck Thickness: .450 in.
- Minimum Bore Diameter: 4.250 in.
- Reduce Combustion Chamber Size 1 cc by Flat-Milling .006 in. from Deck Surface, Maximum Mill .102 in. to achieve 105 cc.
- Angle Mill: Reduce Combustion Chamber Size 1 cc by Flat-Milling .009 in. from Deck Surface, Maximum Mill .198 in. to achieve 100 cc. (Angle Milling will require the use of a .120 in. Thick Intake Gasket)
- Spark Plug Dimensions: 14 mm x .750 in. with Gasket Seat Such as Autolite 417-AR3924 (sold separately)
Emissions: This product is not legal for sale or use on emission-controlled vehicles, and is intended for dedicated race vehicles only
Specifications:
Will the COMP Cams Xtreme Marine XM296HR Hydraulic Roller Camshaft Lift: .566"/.566" Duration: 296°/302° RPM Range: 2800-6200 work with these heads?
Will these work well with a COMP cam XM284HR with Lift: .547"/.547" Duration: 284°/290° RPM Range: 2200-5800
Will these work for a marine application 468
I have a Dart 555 bbc will these work on this set up?
Will these work with a solid roller cam?
I have a factory XCH 454 with 990 heads. Will these heads work on this combo?
Are they rectangle port will they fit 502 bbc?
Will these heads work on my BBC 396/402?
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.