ATK HP90 Chevy 383 Vortec Marine Base Engine 345HP

Engine Specifications: HP: 345 TQ: 445 Block: OE roller block 4 bolt main 1pc seal 1996-2000 Bore/Stroke: 4.040” x 3.750” Displacement: 383CI Crankshaft: Scat Nodular Iron external balance rear of crank/internal balance front of the crank Rods: Scat I Beam 5.7” Rods with ARP 8740 Bolts Pistons: Hypereutectic 9.5:1 compression Rings: Moly Camshaft: Hyd. roller Cam Specs: 210/215 @50 .462in/.470ex 112LSA Timing Chain: Double roller Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60 Rocker Arms: Stamped steel 1.5 ratio Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s) Oil Pump: Melling STD volume Flexplate/Flywheel: Externally balanced – Pioneer #FRA-159 (with scat kit) or Flywheel depending on application Recommended Components: Balancer: Internally balanced – PowerBond #PB1046-N or per application Intake Manifold: Marine grade dual plane Distributor: Marine grade pro billet (iron gear) Water Pump: Per application Carburetor: Marine grade Quick Fuel 650CFM mechanical secondary’s electric choke #M-650 Fuel Injection: Can be used with MPFI, but custom tuning required to ECM. Fuel Pump: Marine grade 110GPH mechanical or an Electric fuel pump Spark Plugs: Autolite #605 Spark Plug Wires: Marine grade 8mm per application Engine Info: Oil: Conventional / Non Synthetic 10W30 Oil