{"product_id":"edelbrock-cylinder-heads-1939-48-model-ford-flatheads-w-block-letter-logo-pair","title":"Edelbrock Cylinder Heads 1939-48 Model Ford Flatheads w\/ Block Letter Logo (Pair)","description":"Ford Flatheads feature the original Edelbrock script logo design for Fords and Mercurys, and are casted at the Edelbrock  Foundry in the USA of T-6 tempered A356 aluminum. These heads are rugged, ribbed internally and externally, with a large  water capacity and excellent breathing characteristics. The 65cc heads support 8.0:1 compression ratio on blocks with a 3\/16 base relief (stock bore and stroke), compression ratio increase is approximately 3\/10 of a percent with each 1\/8 stroke. High Lift\/Large Chamber versions feature a new raised roof combustion chamber design that is CNC machined for high lift cams  and is perfect for reducing compression in supercharger applications or on low octane fuel. High Lift heads have increased valve clearance and increased flow capacity. Match these heads with our popular Ford Flathead Intake Manifolds.","brand":"Edelbrock","offers":[{"title":"Default Title","offer_id":43818366927069,"sku":"EDE1126","price":987.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/3758\/1491\/products\/31fb3cbb2e97d9f3b1ee8f82c5b21860.jpg?v=1682415343","url":"https:\/\/hellhoundperformance.store\/products\/edelbrock-cylinder-heads-1939-48-model-ford-flatheads-w-block-letter-logo-pair","provider":"Hellhound Performance","version":"1.0","type":"link"}