--- title: BP3505CT Series description: GM Small Block Compatible 350 c.i. Engine - 390 Horsepower - --- [Skip to content](https://knowledgebase.blueprintengines.com/knowledge/bp3505ct-series#main-content) English Show submenu for translations ![IN CRATE ENGINES..png\]](https://knowledgebase.blueprintengines.com/hs-fs/hubfs/IN%20CRATE%20ENGINES..png?height=40&name=IN%20CRATE%20ENGINES..png) Open main navigation Close main navigation - English Show submenu for translations - Go to www.blueprintengines.com Go to www.blueprintengines.com How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://knowledgebase.blueprintengines.com/knowledge?hsLang=en) 2. [Engine Specs](https://knowledgebase.blueprintengines.com/knowledge/engine-specs?hsLang=en) # BP3505CT Series ## Horsepower & Torque: 390 Horsepower / 410 FT. LBS. Torque Cylinder Heads: BluePrint Engines Aluminum Cylinder Heads Compression Ratio: 9.2:1 Camshaft: Hydraulic Roller Cam - .495 Intake / .502 Exhaust Lift and 220 Intake / 224 Exhaust Duration @.050-114° LSA Pistons: Hypereutectic Crankshaft: Cast Crank - 3.480" Stroke and 5.700" Rods Fuel Recommendation: 87+ Octane #### Description: - Horsepower & Torque: 390 Horsepower / 410 FT. LBS. Torque - Compression Ratio: 9.2:1 - Aluminum Heads - Hydraulic Roller Cam - Cast Crankshaft - Hypereutectic Pistons #### Block: - BluePrint Engines High Strength Cast Iron Block - Manufactured and Machined in the USA! - 4-Bolt Main - 4.000" Bore - 1-Piece Rear Main Seal - Mech Fuel Pump Provision: Yes - Passenger Side Dipstick - Drilled and Tapped for Clutch Linkage #### Rotating Assembly: - Cast Crankshaft - 3.480" Stroke - Forged 5.700" Connecting Rods - Hypereutectic Pistons - Internally Balanced Front - Externally Balanced Rear #### Cylinder Heads: - BluePrint Aluminum Cylinder Heads - [H8002K](https://blueprintengines.com/collections/cylinder-heads/products/sb-chevy-aluminum-cylinder-head-195cc-assembled-h8002k) - 64cc Chamber - 2.02" Intake / 1.60" Exhaust Valves - 195cc Intake / 75cc Exhaust Runners #### Cam Specs: - Cam Type: Roller - .495 Intake /.502 Exhaust Lift - 220 Intake / 224 Exhaust Duration - @.050-114 Degree Lobe Separation #### Ignition Timing: - 32 Degrees Total at 3500 RPM #### Also Includes: - Rear Sump Oil Pan - Timing Cover - Valve Covers - Dipstick **Recommended Break in Oil:** [**BPP710 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-crate-engine-break-in-oil-1-quart-bpp710) **Recommended Service Oil:** [**BPP10W30 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-10w30-engine-oil-1-quart-bpp10w30) **Recommended Oil Filter:** [**BPP51061 (Click Here)**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061) #### Notes: - The performance aluminum cylinder heads on this engine feature a .500 raised port vs OEM.   Engine Accessory Specifications *Your BluePrint engine was dyno tested with the parts and specifications listed below.  If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.*  **Part Number:** BP3505CT **Fuel Delivery Type:** (Not included) Recommend 670cfm Carburetor [BPP67265](https://blueprintengines.com/collections/carburetors/products/holley-670-cfm-brawler-carburetor-electric-choke-vacuum-secondaries-4150) **Spark Plug:** [BPP7938 NGK 7938 BKR5E](https://blueprintengines.com/products/bpp7938-ngk-7938-bkr5e-spark-plugs-set-of-8) (.750 inch reach, 14mm thread, 5/8 hex, plug) **Spark Plug Gap:** .035" **Harmonic Balancer:** (Not included) Recommend [BPP350](https://blueprintengines.com/products/chevy-small-block-harmonic-balancer-internally-balanced-bpp350) - Non-Weighted, 8" Diameter **Flexplate/Flywheel:** (Not included) Recommend Late 350 Weighted [BPP871006](https://blueprintengines.com/products/chevy-v8-1-piece-rear-main-seal-168-tooth-flexplate-sfi-bpp871006) **Stall Converter:** 2000-2400 rpm **Intake Manifold:**  Dual Plane, Satin Aluminum [BPP350VINT](https://blueprintengines.com/products/blueprint-engines-sbc-intake-manifold-kit-vortec-heads-dual-plane-natural-aluminum) **Fuel Recommendation:** 87 Octane Approved **Timing (Initial/Total Advance):** Initial Timing 10-16° and Total Timing 32° **Firing Order:** 1,8,4,3,6,5,7,2 **Recommended Break in Oil:** [**BPP710 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-crate-engine-break-in-oil-1-quart-bpp710) **Recommended Service Oil:** [**BPP10W30 (Click Here)**](https://blueprintengines.com/products/blueprint-engines-10w30-engine-oil-1-quart-bpp10w30) **Recommended Oil Filter:** [**BPP51061 (Click Here)**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061) **Total Oil Capacity with Production Oil Pan, and Correct:** [**BPP51061**](https://blueprintengines.com/products/sbc-bbc-oil-filter-bpp51061)Filter - 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