Big Block Chevy SS Large Oval Port Heads 3904390 1967 1966 396 427 Dated Aug 1966

General Motors Part No: 3904390

Manufacturer: General Motors

Part Number: 3904390

Interchange Part Number: 1965 1966 1967 1968 1969 1970 Camaro Chevelle Nova Impala RS SS, Corvette BBC Big Block Chevy Chevrolet 396 427 454 closed chamber, 702 muncie 4 speed m20 m21 m22 m 20 21 22 holley 4 barrel carb, carburetor 12 bolt rear end rear end axle console am fm radio, tach tachometer tilt steering column wood wooden woodgrain wheel, 335hp 325hp 350hp 390hp 400hp 345hp 330hp 360hp, ls5 ls-5 290 063 3931063 1969 1970, 3856206 206 702 390 large big round ports

One pair of big block chevy cylinder heads made august 1966.   Part numbers for heads are 3904390.   Dat codes are H56 and H176 so the 5th and 17th.   These heads were cleaned a long time ago and have spent years sitting around.   Large port oval intakes.   Closed style chamber.   Correct for many 1966 and 1967 chevy 396 and 427 applications.   They have surface rust but no pitting .   All bolt bosses and threads are good.   H56 head looks like someone smoothed 1st part of intake runner very mildly if so.   No valves or springs.    These are heavy and will only ship to lower 48 states.   Local pickup in AZ okay.   Shpping $175 for the pair.   If it becomes more and you are in new york i pay the difference.   If it is way less and you are in Cali i will refund the excess shipping.    See pictures.