This is a very nice pair of 1970 Big Block Chevy large oval port heads. The casting number on each head is 3964290. The 3964290 heads were used in the 1970 model year only on 396 and 454 engines. The date codes on these heads are E 4 70 and E 12 70. These dates decode as May 4th and 12th, 1970. These are great for restorations and also for boosting the compression of a low performance engine. These heads just came out of the stash of a long time machine shop owner/hot rodder. They were pulled off a running engine and have been in cool, dry storage ever since. There are no cracks, porting, modifications, or repairs. The heads are bare cores so you can start with all new parts. The deck surfaces are very thick as shown by the deck indicators on the undersides of the head. In fact, I do not believe these heads have ever been surfaced or had any other machining done to them. All threads are in good condition with no thread inserts or helicoils. The heads have no porting or modifications. These are very hard to find one year only castings. This is your chance to own a nice original pair of 3856206 heads at a great price. Don’t Miss Out! Check out my other listings for more rare and hard to find parts. The item “1970 Big Block Chevy Oval Port Heads 3964290 396 454 Camaro Chevelle SS Corvette” is in sale since Thursday, March 12, 2020. This item is in the category “eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “super-novass” and is located in Santa Cruz, California. This item can be shipped to United States.
- Interchange Part Number: Camaro Chevelle Corvette 1971 1972 063 702 RS