**1973 bastard 340 balance??**

It's the offset weight amount in the balancer and flexplate.

360 balance


340


That's the correct flexplate for a ext balance 340

So if there is excess weight from them busting the balance weight off the converter "welds not ground down" do you think that could possibly be the vibration?

I know I'm pissing in the wind cause I didn't build the engine. Someone could have replaced just 1 piston/ rod during its life and I wouldn't know at this point.