The 40 year old duct hoses are pretty deteriorated.  Best suggestions for replacements?  I am finding some 2" duct hose from DORMAN #96034 which looks more like the duct hose for the heat exchange from exhaust manifolds from older vehicles.  Helpful suggestions always welcome.  The resurrection project is slowly marching on.  I will have a little more spare time the next few months now that school is over and my babysitting duties are done until the middle of August when our daughter returns to