There is only 1 style k member for the early a bodies. Slant 6 and V8 have the same one. Your only options as far as I know are original 273 mounts, a motor plate or the conversion mounts from slant 6 to small block. The problem I had with those was in the area I colored red there’s no support from front to back. With my mild 360 a 4 speed and slicks it bent them. When it bent them it shoved the whole engine and trans toward the back of the car. Hope this helps.
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