{"product_id":"atk-hp98m-chevy-350-mid-dress-engine-345hp","title":"ATK HP98M Chevy 350 Mid Dress Engine 345HP","description":"\u003cp\u003eEngine Specifications: HP: 345 TQ: 400 Block: OE block 4 bolt main 1pc seal 1987-2000 Bore\/Stroke: 4.040 x 3.480 Displacement: 350 Crankshaft: OE Reground external balance rear of crank\/internal balance front of the crank Rods: OE powder metal 5.7” Pistons: Hypereutectic 9.1:1 compression Rings: Moly Camshaft: Hyd. roller Cam Specs: 220\/224 @50 .495in\/.502ex 110LSA Timing Chain: Double roller Cylinder Heads: ATK cast iron 76cc\/165cc 1.94\/1.50 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 high volume Balancer: PowerBond internal balance 8” #PB1046-N Flexplate\/Flywheel: Pioneer #FRA-159 external balance 168 tooth Intake Manifold: ATK dual plane intake Distributor: HEI (Iron gear) Water Pump: OE long pump Recommended Components: Carburetor: Quick Fuel 680CFM vacuum secondary’s with electric choke #HR-680 Fuel Pump: Holley mechanical 110GPH #12-327-11 Spark Plugs: Champion #RV12C Spark Plug Wires: 8mm Engine Info: Oil: Conventional \/ Non synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles Oil Filter: Wix or K and N per application Timing: 34-36 Degrees Spark Plug Gap: .035” Firing Order: 18436572 Octane: 91+ Stall Converter: 2200-2500 Exhaust: 1 5\/8 Headers Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and or other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.\u003c\/p\u003e\n\u003ch3\u003eHighlights\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBlock: New GM LT1\/LT4\u003c\/li\u003e\n\u003cli\u003eBore\/Stroke: 4.065” x 4.000”\u003c\/li\u003e\n\u003cli\u003eDisplacement (cu.in): 416 CID\u003c\/li\u003e\n\u003cli\u003eCrankshaft: Manley 4340 forged 58 tooth reluctor wheel\u003c\/li\u003e\n\u003cli\u003eRods: Manley 4340 forged H beam 6.125” ARP 2000 bolts\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Displacement:\u003c\/strong\u003e 350 cu. in.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylinder Head Material:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIntake Manifold Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOil Pan Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTiming Cover Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHarmonic Balancer Included:\u003c\/strong\u003e Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlexplate Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlywheel Included:\u003c\/strong\u003e No\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial Type:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMFG. Part #:\u003c\/strong\u003e HP98M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGTIN Code:\u003c\/strong\u003e 00653517541261\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSold in Quantity:\u003c\/strong\u003e Each\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e ATK Engines\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Erise Motors","offers":[{"title":"Default Title","offer_id":67752131658048,"sku":null,"price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1001\/7757\/6256\/files\/35020176_L700_bf2891b2-93c4-4f87-ab12-72be7957e2f5-510x510.jpg?v=1791839199","url":"https:\/\/vorlaxauto.com\/products\/atk-hp98m-chevy-350-mid-dress-engine-345hp","provider":"Vorlax Auto","version":"1.0","type":"link"}