Port Cylinder Head

425hp
3866963_Original_GM_Aluminum_Intake_1965_Big_Block_Chevy_L78_396_425HP_BBC_SWEET_01_nh

3866963 Original GM Aluminum Intake 1965 Big Block Chevy L78 396 425HP BBC SWEET

This is an original GM high performance aluminum intake manifolds for Big Block Chevy engines with rectangular port heads and a Holley carburetor. The casting number is 3866963 as shown. The 3866963 intake was used in the 1965 model years only on the high performance L78 396/425HP engines. The casting date on the underside is 3/15/65 which obviously can not be seen when installed. This is a very hard to find production dated 3885069 intake. This intake is in very good condition as shown. It is in bare aluminum finish with no paints or coatings and looks more like a piece of jewelry than a mechanical part. The part number,…
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1966_Corvette_427_425HP_L72_Cylinder_Head_3873858_GM_Rect_Port_Dated_J_1_5_01_ogjx

1966 Corvette 427 425HP L72 Cylinder Head 3873858 GM Rect. Port Dated J 1 5

1966 Corvette 427 / 425HP L72 Cylinder Head #3873858 / GM Rect. Port, Dated J 1 5. This is a clean looking head, it has been ported on the intake and exhaust, and appears to be set up for 2.25" intake and 1.88" exhaust valves. The intake bowl has been opened up below the seat. I haven't magnufluxed the head, but did a thorough magnified inspection with high intensity light. It looks good, along with all threaded holes. The casting date of Oct. 1st, 1965 is very early. The item "1966 Corvette 427 425HP L72 Cylinder Head 3873858 GM Rect. Port Dated J 1 5" is in sale since Friday,…
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69_Big_Block_Chevy_Rectangle_Port_Cylinder_Heads_3919840_427_425hp_Copo_LS6_L78_01_lf

69 Big Block Chevy Rectangle Port Cylinder Heads 3919840 427 425hp Copo LS6 L78

This is a very nice original matching set of 1969 Big Block Chevy Rectangle Port Cylinder Heads # 3919840. These are complete with valves and have no rust, cracks, damage or modifications. These are date coded D30-9 and E6-9. Please view many more pictures below. The item "69 Big Block Chevy Rectangle Port Cylinder Heads 3919840 427 425hp Copo LS6 L78" is in sale since Saturday, April 6, 2019. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "musclecarsanhandlebars" and is located in Middleburg, Florida. This item can be shipped worldwide. Manufacturer Part Number: 3919840 Brand: Chevrolet…
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