These HOOKER engine swap mounting brackets facilitate the installation of an GM LS motor into a 1978-88 A/G-Body as part of your LS swap project. This mounting bracket kit is part of the most comprehensively engineered system of mounting components, headers and exhaust systems available for this application. The entire HOOKER swap system is designed to decrease your total swap installation effort and cost, while increasing the engineered quality of your vehicle and compatibility of these components with other popular aftermarket components. Please read the provided instructions thoroughly before attempting installation. Specifically designed for bolt-in compatibility with the Hooker transmission swap components. Fully compatible with Holley LS swap oil pan and accessory drive brackets. Hooker 12643HKR LS-Swap Engine Mount Brackets. Provides an engineered 3 to 3.5 degree engine/transmission inclination angle that is critical to obtaining usable U-joint working angles (especially in lowered vehicles). Mounting hardware included – (8) M10 x 1.5 x 30. 1978-88 GM A/G-Body LS-Swap. Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years.