Start the engine and bring to break-in rpm. The Vortecs will flow more and be more efficient, but the TBI is only good for 520 cfm 3' IIRC. Slow idle speeds may result in severe cam and lifter wear. Do not allow the engine to run under 2000 rpm for the first 1/2 hour. Coat cam lobes and bottoms of each lifter with MoS2 lube (supplied) to prevent cam lobe and lifter wear from occurring during initial start-up. 14,999.99 25-TSP427RESL-SHREDDY-LB TSP Blake Wilkeys Megalodon Shreddy 427 Resleeved. Oil/additive must contain Zinc designed for use with flat tappet camshafts. TSP 7.3L Godzilla Crate Engine with Stage 2 Cam and Ported Heads. In order for this Performer-Plus cam and lifter kit to be covered under ANY WARRANTY you must use either the correct Edelbrock Sure Seat valve springs or the stock original equipment valve springs.
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