So lost...

Is it just me or does it look like one mount is higher in that pic?

if your are talking about my pic. yes it is.its for a slant six engine.

here are the instructions for the 73 up v8 to rb engine mounts.
http://www.engine-swaps.com/Pages/InstructionPages/73andUpV8-BRB.html

and here are the ones for a s6 to rb engine.
http://www.engine-swaps.com/Pages/InstructionPages/73andUpS6-BRB.html