I've got a L4 date (nov 1964) hipo harmonic balancer to trade for an early 66 date coded one (A-D 6). Part is used but not abused. PM if interested.
Im not looking for a trade, but I have a C5 dated balancer.
let me know if interested
Can't use the one you have but for a possible trade for a Dec 65 or Jan 66 I've got a C6 dated one in new condition
Just throwing it out there