GM LS & Gen-V LT engines make great power and are ideal for engine swaps in the 1963-67 GM C10 Trucks. Hooker BlackHeart application-specific LS/LT swap engine mounting brackets remove the installation guesswork and compatibility uncertainty that comes with using universal/adjustable swap plates. These brackets are designed for 1963-1967 GM C10 pick-ups to achieve optimized component clearances and drivetrain/U-joint operation angles when used in conjunction with 71222024HKR, 71222024HKR-1, or 71222024HKR-2 transmission crossmember and Hooker cast exhaust manifolds and dual exhaust systems co-developed for this application. These motor mounting brackets fit both the LS & LT engines, and allow a future engine upgrade by changing the clamshell that attaches to the engine (when upgrading from LS to LT engine). These brackets are for use on trucks with the wide style frame rails (see photo below to identify if you have the wide or narrow frame rails).