346236 BBC Pass Oval Port 402 454 Cylinder Heads. Cast dates J 21 74, J 31 74, 1975 passenger car applications. Heads have been disassembled, cleaned, magnafluxed and check out OK. No cracks or stripped threads present. These are passenger car, high velocity “peanut” port cylinder heads that are known for producing exceptional amounts of low end torque and the highest highway fuel efficiency possible on big block engines. These heads are compatible with OEM 384740 Rochester Q-Jet intake manifolds. Head J 31 74 has a lengthwise scratch on the combustion chamber side which should not be a problem if you are using composite head gaskets, see picture detail. We will include the original intake/exhaust valves, valve springs and shims with these heads. A reputable machine shop should be able to recondition these cylinder heads using some, if not all of the existing factory hard parts. If we had a supercharger setup and some quality pistons, we could have some fun with these! Look the pictures over, what you see is what you get. Add a map to your own listings. The item “346236 Matched Date Pair BBC Oval Port 402 454 Cylinder Heads” is in sale since Monday, April 8, 2019. This item is in the category “eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “oldchevystuff2012″ and is located in Canton, Ohio. This item can be shipped worldwide.

• Manufacturer Part Number: 346236
• Warranty: No
• Part Brand: Chevrolet GM