273 motor mount help

After six years of sitting around we are finally putting our 68 318 into are in 64 barracuda which originally was a 273 car, we're having major issues with the motor mounts the rubber insulators we are buying won't fit the motor brackets we have we don't know if we have the right motor brackets we don't know what the right motor brackets look like can somebody help me out with some pictures or some numbers or something please? I posted pictures of what we have and what we are trying to use which is not working

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