Engine shakes BADLY!!

GEO said

does the engine smooth out when the rpm is increased?

If not is the balancer and torque converter right for the crankshaft?



As 340 came with both forged and cast cranks , forged cranks internally balanced , cast cranks externally balanced.

If you have them mismatched they will shake really bad

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Hey thanks for the reply.
My engine builder(machine shop) did all the internal balancing. I know we kept the stock crank but he made sure everything was balanced correctly together.

As far as the convertor I have yet to put my new 3500 stall in. My current stall is around 2300 foot brake stall (supposedly 2800 from previous owner) and may be a lil shy of stall for this cam.