BluePrint MBP3830CTC GM 383 Base Marine Engine, Cast Iron Vortec Heads

True Blue Power! BluePrints pro engine builders are enthusiasts just like you and it shows in the quality and performance of every engine they build. Each BluePrint crate engine is carefully dyno tested and ships with printed, proven results. If you’re looking serious horsepower at an affordable price, BluePrint Engines is the choice for you! GM 383 Base Marine Engine – Cast Iron Vortec Heads – Roller Cam Overview HP & Torque: 405 HP / 450 FT LBS Cast Iron Heads Roller Cam Cast Steel Crank Part #: MBP3830CTC Block Seasoned 4-bolt main Max .040 bore One piece rear main seal Sonic tested to assure wall thickness Align honed main bearing bore Rotating Assembly New cast steel premium crank Hypereutectic pistons New roller camshaft Cylinder Heads Cast Iron Vortec 1.25 dia. valve springs, hardened retainers and keepers 1.940 swirl polished intake valves 1.500 swirl polished exhaust valves Elgin hardened push rods Long slot rockers with positive lock adjusting nuts Cam Specs Cam Type: Roller .495 Intake .503 Exhaust 220 Intake / 224 Exhaust duration @ .050 – 112 degree lobe separation Also Includes New cast iron marine intake Fuel Pump Fuel line and filter Cast iron circulating pump 750cfm carburetor