Engine Vibration 3k RPM

plumkrazee70 said

I wouldn't say it vibrates worse in N, I would say the opposite. Its worse when driving at that RPM.

All three mounts are new and in good shape.
The exhaust was just welded up (Summit kit w/clamps)
The balancer is new, but I would like to recheck the timing to be sure it hasn't jumped.
I can't remember if the engine was balanced when it was put together as that was 8+ years ago. I do remember KB hypers +.040, the crank and rods were what came with the motor (stock stroke). It was a very mild build as I wanted to have a nice driver.

What is the best way to verify engine balance? Does the motor have to come out and take apart?

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Oh, you said in the original thread post that it was less pronounced with the wheels on the ground, at speed. And that it can be felt in neutral.

As for your engine balance, go through all your documents and see if it was balanced. You’d surely know if you bought a balance job or not. It’s at least a couple hundred $. And with a good balance, they want to also have the flywheel/flex plate, balancer, and sometimes the torque converter. Not just a crank and block.

it would be my assumption that if the engine was not balanced, it would vibrate and has a resonance at that specific rpm range. I had a 360 with KB pistons, no balance and it would have a certain rpm spot it would resonate at.