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: BP38350CT1 Fuel Delivery Type: Factory Fuel Injection from 1996 – 2000 Chevrolet Trucks and SUV’s required for emission compliance Spark Plug: BPP7938 NGK 7938 BKR5E (.750 inch reach, 14mm thread, 5/8 hex, plug) Spark Plug Gap: .035″ Harmonic Balancer: BPP400L – 400 ci weighed, 8″ diameter Flexplate/Flywheel: Late 350 Weighted Stall Converter: Stock rpm Intake Manifold: OEM Vortec Fuel Recommendation: 91 Octane Timing (Initial/Total Advance): Factory ECU Ignition timing Firing Order: 1,8,4,3,6,5,7,2 Recommended Break in Oil : BPP710 (Click Here) Recommended Service Oil : BPP10W30 (Click Here) Recommended Oil Filter ; BPP51061 (Click Here) Total Oil capacity with production oil pan, and Correct BPP51061 Filter : 5 Quarts Header Partners: Click here for our Header Partners and recommendations. Click here to download a copy of the Installation Guide that came with your BluePrint engine.