Billet Engine Swap Bracket SBC LS Conversion Motor Mount Adjustable Plate LS1 LS3 Adapter Motor 551628 LS Series... Adapts Small Block Chevy... Adjustable with 4 Positions... Natural Billet Aluminum... Includes: (2) Adapter Plates & Hardware Adjustable from stock bellhousing position, .625", 1.625" forward, and 2.250" forwardThese brackets allow a LS&nbsp;engine (Gen III/IV) to be bolted into a vehicle that had a Small Block Chevy engine (Gen 1).Mounts have the same 3 bolt holes on each side of the block that the factory SBC blocks have for the engine mounts.Clam shell motor mounts will require trimming of the front lower corner to clear vacuum pump...