Specifically designed for bolt-in compatibility with the Hooker transmission swap components, It installs onto stock 1972-up clamshell mounts without the use of adapter plates, Is fully compatible with Holley LS swap oil pan and accessory drive brackets, Provides an engineered 3 to 3.5 degree engine/transmission inclination angle that is critical to obtaining usable U-joint working angles, Will fit most F-body GM vehicles (see list). Hooker 12613HKR GM F-body LS-Swap Engine Mount Brackets. Facilitates the installation of any LS style GM engine into a 75-81 year model GM F-body vehicle. Specifically designed for bolt-in compatibility with the Hooker transmission swap components. Installs onto stock 1972-up clamshell mounts without the use of adapter plates. Fully compatible with Holley LS swap oil pan and accessory drive 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). 1975 Chevy Camaro 1975 Pontiac Firebird 1976 Chevy Camaro 1976 Pontiac Firebird 1977 Chevy Camaro 1977 Pontiac Firebird 1978 Chevy Camaro 1978 Pontiac Firebird 1979 Chevy Camaro 1979 Pontiac Firebird 1980 Chevy Camaro 1980 Pontiac Firebird 1981 Chevy Camaro 1981 Pontiac Firebird. Perfect for my project direct fit. By Leo on January 09, 2020. Perfect fit and alignment. By Camaroman70 on September 20, 2017. 78 Camaro LS swap. These mounting brackets fit perfectly and positioned the engine right where it needed to be. Yes, I recommend this product. Related Items / Suggested Parts. Hooker 12614HKR 2nd Generation F-body LS Swap Transmission Crossmember. 1973-93 GM Clamshell Engine Mounts, Pair. 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.