Several sets of New Big block Chevy Square Port Aluminum heads by Precision Foundry & assembled by the engine masters at Muscle Marine Engineering. E xcellent for supercharger, Nitrous or marine use. Come std with 1.88 Inconel exhaust valves & Severe duty 2.300 Stainless USA intake valves. 650 lift Hyd Roller cam only with #170 seat pressure. 1 21 cc Combustion Chambers. 3 35 cc Intake Runners. Assembled and ready to bolt on. Price is for 2 heads. The item "BBC Rectangle Port Aluminum Heads, Excellent for private label customers" is in sale since Wednesday, May 25, 2016. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck…