BluePrint Engines Chev LS 427 Pro Series EFI Dressed Engine 605hp # PSLS4273CTFGM LS Compatible 427 c. i. Pro Series Engine 605 Horsepower Base Dressed Holley Terminator X EFI System Overview: The Blueprint Engines 427cubic inch Pro Series crate engine is a dyno tested, turnkey powerplant that delivers 605 horsepower and 565 lb ft of torque, making it an ideal match for Holleys Terminator X Max 550 931 EFI system. This engine features a BluePrint Engines High Strength cast iron (LSX Style) block with reinforced internals, steel