Mounting a jib into a truckbed

I've got an Ez-Fx jib with extension, cameraturret PT24 pan/ tilt head and shooting with the Hpx-500. My plan is to mount the jib in the back of a truck and shoot some beautiful footage of motorcycles driving on the road for a client.

My problem is putting the jib in the truck, I get an unbelievable amount of vibration that transfers itself to the the camera head. I strapped down the jib base to the truck bed and it felt stable, but the camera head looked like it was going to vibrate off.

We don't have the budget to rent a crew with adequate equipment to get the shots for us, so I'm wondering if anyone can help me think of a method to reduce the vibrations from the truck to the jib head.

My first thought was to put a number of blankets between the truck bed and the jib base to try to lessen the vibrations.

I would be most appreciative if some of those wiser than I would share their ideas. If anyone has done something similar, I would love to hear about it, or see it.

Thanks in advance,

Denton