1970 340 Balance Problem...Bottom Line

first off , Locomotion is dead on as to the cast vs forged crank issue. My 73 340 4sp
Dart sport came with a cast crank. I am not so sure about the accuracy of the 400 4sp and 440 truck motors having forged units. I would like to see or hear some definitive proof of that. As for the strength of each, Herb McCandless personally
walked me thru the build up of my motor and told me not to worry about the strength
of a cast unit as he has seen very few failures of them.

2nd, nobody has informed Pastortom that he will have to have his motor rebalanced
when he goes to a new balancer. It would seem to make sense , we have no idea of the quality of work or competency of the previous owner! The current balancer may be fine, but the balancing job may be bungled. I'd hate to see him throwing a bunch of money at the problem with no results.

Just my 2 cents, let's here what you think