Thanks Jack,
I was afraid of that.
Joe

Does anyone know of a supply source for oversize pins? I see in the Shop Manual several oversizes were available, but have not seen nor heard of any in actual use.
Thanks,
Joe

Unless the 320 needs a total rebuild including new pistons, I'd leave it a 320. I once rebuilt a very low mileage 320, installed 56 heads on it, and put it into a 56J. That motor ran nice and cool, and got better gas mileage than any 352 I had ever ran.

The power is noticeably less, but unless you are planning on drag racing, that should not be a big deal.

The TC was likely balanced at the factory. But if anyone has disassembled it during the past 50+ years it may be out of balance. I recall making an alignment mark across both halves, before dis-assembly. If the halves are not reassembled exactly as they were when balanced, it screws up the balance.
So, if none of the aforementioned fix the problem, it may be in the TC.

I once test drove a 56J with Torque-Flight tranny installed, and it had a pretty bad vibration, coming off idle till about 2000 RPM. I hypothesized it was due to the spool adapter being slightly out of alignment, but passed on buying the car for fear that fixing it coulda turned into a can of worms.

Is the motor in a Packard, 56J, or Nash? Is the vibration most noticeable when sitting in the car, or leaning over the fender? Are any of the motor mounts "bottomed out", or brittle? Are the exhaust pipes "kissing" the frame anywhere? Are the pipes rubber strap mounted, as they should be? If in a 56J, is the generator bracket kissing the fender apron?

Did he have the rods checked for straightness when he did the rebuild?

Can he "feel" the vibration, in synch with his ears, by laying his hand on the motor? If its a 56J, can he feel the vibration, in synch with his ears by putting his fingertips on the headliner?

Yep,
Never fails, when rebuilding a motor from an old Packard or Studebaker that, "ran when parked". They usually turn out to have been parked several decades ago, and if the rebuilder leaves one stone un-turned it will come back to haunt later.

I must confess though, I have never pulled the plugs on those shafts. Usually, strip the rockers off, then soak, then use a spray can of carb cleaner to insure all the holes are open. No doubt, it would be wiser to pull the end plugs and run a bore brush through the shaft.

There's just a ton of labor in rebuilding a 50 year old motor, given the attention to detail most of them need.

I have tried a 3/8" pipe fitting, and the threads do not fit. What I have found to fit is the #6 fitting for an AC system. A #6 is the smallest of three lines in the AC, and connects condenser to drier. The other two AC lines, #8 and #10, are larger. So if I can just figure out what the #6 line, male fitting is correctly called, then I have the threads figured out.

As for the flare, I understand there are 45 degree angles and there are 38 degree angles. The 38 is per AN and SAE spec, but unsure about the 45. Also, there is a spec sometimes called, "power steering only". Also, of course I'd want the PS fitting to be mild steel instead of aluminum.

So, I was hoping someone here would know, without me having to swim upstream on this project ofinstalling a 55-56 Packard PS pump on a 56J. I did so before, long ago on another 56J, and it worked great, was smaller, and cleared the water-pump pulley better. But that pump was off a Nash, and had a 90 degree adapter coming off the pump itself, which plugged into the OEM 56J pump line perfectly. So, long story short, I am now trying to replicate that adapter. Any help would be appreciated.
Thanks,
Joe

Yep, looks like its gonna be a long, cold winter. I'd drain a gallon or two out, refill with 100 percent pure antifreeze, then start and warm up the motor to insure circulation. You could save the diluted antifreeze for next year and topping off when needed.
Considering the price of a busted block, the price of antifreeze seems cheap to me.
Joe

Can anyone tell me the thread size & flaring type of the male fitting, for the pressure hose coming into the pump ? It is the line on the right in the attached pic.

(Big Kev I hope you don't mind that I "borrowed" a pic of your PS pump from the project blog thread :)

Thanks,
Joe

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Avanti,
I agree on the stand out :) But thought the front end of this car sat quite a bit higher than those I have seen. Though I am definitely not a Packard expert in any sense of the word.