These pair of heads are NOS from a Chevrolet dealer in IOWA. They were on his shelf for many years. NOS still in the Box/ NIB. They are very heavy. I can use UPS or. Please feel free to ask any questions. The item "Chevrolet Big Block Chevy Truck Oval Port Cylinder Heads 343771 tall deck 427" is in sale since Wednesday, November 11, 2020. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "dare2brare" and is located in Kansas City, Missouri. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria,…