These engines are internally balanced, so any harmonic balancer should do. Even if they were not, the final balancing is usually done by the flywheel, and I am quite confident its not custom for every engine. By the way, the term harmonic balancer may be a bit confusing. It's not really balancing anything, it just absorbs torsional vibrations in the crank. That does not mean its not necessary. D^2 Quoting Jeff Carrothers <jeff@xxxxxxxxxxxxxxxxxxxx>: > Hello everyone, > > The harmonic balancer has separated/come apart on my 62 Imperial > Lebaron. > Is the harmonic balancer specifically balanced to the crankshaft in my > engine.....or will a harmonic balancer off another 413 engine from 1959 > to > 1965 work? > > I'm trying to find out if I have some other options besides having the > original one rebuilt. > > Thanks in advance, > > Jeff Carrothers > 56,59,60,62,64 Imperials > 65 New Yorker > > > >