The Cima was never brought to the states. There is a belief that that the CIMA VG BLOCK is actually slightly different. It appears to be the same but the myth is that the cima block is suppose to have thicker cylinder walls and thinner coolant passages around the cylinder wall. You can bore it out much greater but prone to over heating. The 300z heads bolt right up. (I know this for a fact as I have a cima block in great condition) All the castings are the same except the cylinder wall is suppose to be thicker so I've heard. Anyone one else want to chime in and correct or solidify my accusations?