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In the October Sport Truck they dynoed at Vortec 454, 4l80e, 10.5" 14 bolt rear truck with teh 290 hp 410 lb/ft torque engine and it dynoed 215 rearwheel hp and 323 lb/ft of torque at the rear wheels. That hp number is brutally low, and the TBI 454 is worse than the Vortec 454. Sep 14, 2015 · The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval-port heads (to replace the peanut ports used in the previous Gen V motors) and a slightly higher static compression ratio. Search Results Nelson's Speed Shop Greenville, MI (616) 754-9185