The inner part that attaches to the crankshaft is bonded to the outer part with the pulley. With some kind of rubber(elastomer?) the density of that rubber stuff matters. It does the "Damping" work. When that bond fails...there can be hell to pay. Wobbles equal a fail. Common reason for the bond to fail is the use of the wrong puller when removing and striking the outer part when installing. The 2 parts are big chunks of Iron. Not likely to be damaged by much. The bond however can be broken. I use the 2 threaded holes to pull and an old socket in the center with a block of wood(a chunk of 2x4 works) and a BFH(large hammer) to reinstall. If it is a slip fit on the crankshaft, then drill and tap for a retaining bolt. Can the damper from a 216 be used? Pulley width might be the issue?
