1970 340 Balance Problem...Bottom Line

Just a couple of thoughts and one fact........ First, I think the term "guru" is probably overused and over emphasized in many things from Mopar knowledge to tiddly winks. Second, I'm sure Mr. Shepard is among the most knowledeable Mopar minds out there, and yes I also have his book. Third, (and this is the one fact that I alluded to) I bought my Duster 340 (manual transmission) new in '73 and it DOES have a cast crank and NOT a forged crank.