Some of you know I have a wicked vibration in the Duster at about 55+ and I get it in surges now and then at lower speeds. I've suspected Axles since thats the only thing I didn't touch in the cars going-through. the right rear seems to have a slight wobble to it.

But with the motor..

My set up is an early 360, with the Eagle Cast 4" crank. I have the Professional products balancer. I had a Boss Hogg TC that I am pretty sure of my memory has no added weights on it. I have the B&M flexplate with the offset as well.

I know i need to get with engine builder on how it was balanced exactly, but I noticed Eagle states their cast pieces are external balance.

With that in mind when I was setting at a light tonight, at idle, the car kinda shudders, you hear the steelwork of the body just buzzing. That and the bad vibration makes me curious about the balancer, etc the balancer has the weights you can add, depending on what you have. currently, this balancer has no weights in it. It's set for a neutral balance.

I'm just wondering, until I can talk to machine shop.