I am looking for quick solution as I did not forsee this hickup when doing the chain & rear main updates I'm working on.

Sorry, but I'm a bit confused... You need a truck harmonic balancer?  Is there a difference between car and truck balancers?  What's wrong with your old one, and what has a balancer got to do with either your chain or main seal???

I see balancers on sale on the net; single and double groove.  One site will give you $40 exchange for your old one.  When I went to A/C, I bought a double sheave on eBay.  The guy I bought from sold dozens of them.

There are many Y balancers.  Different configurations by year, belt arrangement, belt alignment, belt width, car, truck, Bird, with or without damper rings, belt groove on the damper ring, etc.  All will fit on the Y crank.

The new harmonic damper being sold by Falcon is the same as the one being sold by John Mummert.  It’s actually a very nice looking unit and matches the stock dimensions for both the later model car and truck engines.  Watch out for fan belt sizes though as the earlier cars used a wider belt than the later models.  As John mentions, there are several damper designs over the years.  The earlier model truck and pickup engines used a very different design damper that incorporated a considerably wider front belt to accommodate the relocated fan mount.

As far as rebuilding the stock dampers, Damper Doctor is just one of the companies specializing in this service.  Here’s a link to Damper Doctor.

I knew there were different numbers of sheaves, but didn't realize there are so many configurations.  Wonder why anyone would put a belt on a rubber-mounted damper ring???

I learn new stuff every day, here.  Thanks, John.

Dave.  Ford did this across the board on both the FE’s and the Y engines starting about 1960.  This was simply less expensive from a production standpoint but the harmonic dampers didn’t last as long due to the drag of the accessories against the rubber under the damper ring.  Damper ring failures were very prevalent on the FE’s that had this particular damper design.  Such a problem in fact that the FE’s had a special belt pulley designed in the short term that would circumvent using the damper ring as a belt drive.  The engines eventually went back to a damper ring design that didn’t directly drive any of the accessory belts.

Doesn't mounting a V-belt in a rubber or urethane-mounted ring make about as much sense as retarding a cam 8* in a factory 460?  Those harmonic rings tend to disintegrate all by themselves even without the stress of a belt.

I had a family car, a Tempo I bought new in '92, that made such a racket, stopping at a light was embarrassing.  Then I realized, just about all Tempo's suffered the same loose balancer affliction.  The problem was so common, Murray's (now O'Riley's) stocked Ford-branded balancers in all their stores (at a cheaper price than Ford dealerships).

Once I find TDC, I file two notches in the solid pulley and paint them yellow; one at zero and the other at 6*BTDC.  Makes it easier to see and if the factory marks move I can tell right away.

Thanks to both of you guys for sharing your long history with FE and Y-Block engines.

  - Dave

Check with your compadres at Ford about how wise it is.  They designed them, not Ted.  One of their "better ideas"?

Today, engines use lash adjusters, (not hydraulic lifters), and roller followers, instead of rocker arms.  Overhead cams eliminates pushrods, which allows lighter springs because the valve train is much lighter (less kinetic energy to overcome) and they rev much higher as a result. 

So many things have changed on all engines.  EGR, TPS, EEC, O2 sensors, etc., etc.  I believe that's why everyone likes the Y, it's simple and sized conservatively around 300 cu in's.  It needs to be appreciated for what it is.  Changing the Y to a more modern setup (like EFI) would be too cost prohibitive.

Maybe the days of de-tuned monster engines caused Detroit to be at 14% unemployment right now, the highest in the US.  GM and Chrysler are all but a shell of their past.  Americans are buying Communist Chinese goods as fast as they can, and all our manufacturing is gone, overseas.  Hopefully, Detroit will produce whatever we need, be it hybrid or electric, to transport Americans in the future.  If Detroit fails, the car companies will close shop (leaving all their debt here), and the only available models will be Chinese Chrysler's, Ford's and GM's.

  - Dave