Has been line bored and honed. Engine Pro double timing chain unit. Comp cam lifters and CAM with hardened push rods. Decked block with balanced assembly and ground crank.
New forged pistons with Molly rings. Recondition rod connectors with ARP bolts.
Three ANGLE valve job , roller tip rockers arms. BOP rear seal and FEL PRO gasket set.
This is one of the best motor made in the power making years of Pontiac production. Factory stated specs are in the 340-360 HP range.The 670 heads are the last of the closed chamber heads. Cometic head gaskets were used. The item "1967 PONTIAC GTO/GRAND PRIX/ FIREBIRD. 400 hi compression motor with 670 heads" is in sale since Sunday, January 12, 2020. This item is in the category "eBay Motors\Parts & Accessories\Vintage Car & Truck Parts\Other Parts". The seller is "eroglada-0" and is located in Chicago, Illinois. This item can be shipped to United States.