Hooker Headers 12643HKR Engine Mount Brackets. Engine Mount Brackets; 1978-88 GM A/G-Body LS Engine Swap; Incl. Engine Type: LS Swap. WARNING CA Proposition 65: Yes. Most Durable Design Available. These Hooker BlackHeart 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. […]