Small Block Motor Mount Brackets

LEFT IS 273-318 67-72 A-BODY and a spacer wont help you cause there is no ear on the mount to use on a 340-360 block
You can modify the drivers side mount to work on a 360 340 buy welding on an ear, if you are adapt at something like that, and aren’t worrying about part correctness, as the 340 360 mounts are very scarce at this time, and if you find them they are expensive.