Mark Shead advised that he has used vibratechnics on the driver side but standard engine mount on the passenger to keep the noise and vibrations down. On that basis I will give one a try and see how it goes. I actually bought 3.....the reason for this is that they give a perfect shape for me to mill the other 2 down and use them as a perfect spacer to raise the engine up. If I remove the rubber mount I am just left with the oval shape in the correct material with the correct hole spacings. I can use 1 to try and if it doesn't work as a spacer I can always fit the other to the passenger side.