GM 6272292 BB Chevy Oval Port Cast Iron Bare Cylinder Heads, Pair. 402-454ci Heads, Dated: F-1/2-1972, No Hardware. The free listing tool. The item "GM 6272292 BBC Oval Port BARE Cast Iron Cylinder Heads, Dated F-1/2-1972" is in sale since Tuesday, September 5, 2017. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Cylinder Heads & Parts". The seller is "terry_rosebush_motorsports" and is located in East Jordan, Michigan. This item can be shipped worldwide. Part Brand: General Motors Manufacturer Part Number: 6272292