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Well, OK - simple things first. Before you do a compression test let's just (1) make sure you have spark at the plugs, and (2) that the distributor isn't installed 180 degrees out of position. Pull #1 spark plug and either lay a coin or your finger over hole. Crank the engine until you feel or obser...

Generally loss of cylinder compression in all or most all cylinders comes on quite gradually over tens of thousands of miles, the result of simple wear to cylinder walls, pistons and rings, and valves. If it only occurs in 2 adjacent cylinders it is most often the result of a blown head gasket thoug...

Yes, it does appear to be a 12th Series Packard Eight (320 cubic inch disp.) motor, the motor number would confirm and be a useful addition to your information about the motor. Motor numbers for the 1200-1201-1202 would be between 385001 - 390301.

I note the wanting to associate hard starting (or no starting) with a slow cranking speed. But these engines had by design cranking speeds that compared to more modern cars seems very slow. Consider that when you "jump-start" these engines, they can start with just a portion of a single revolution. ...

Is the ground (negative) battery cable also suitably sized for 6-volt use? Doesn't do any good to just change one of them if the other is still undersized.

You have confirmed spark at the plugs, right?

Packard did not keep production records by individual body style until the postwar era, but historians have made production estimates based on the vehicle numbers of surviving cars. As you probably know, the second half of your vehicle number (number on the patent plate) is the sequential production...

Sorry I can't answer specifically but in my experience such plugs typically close off terminal openings used in the process of forming the internal fluid passages in the casting. The ones I recall were aluminum and tapered in form. If I'm correct, I'd hope your carburetor rebuilder can provide a new...

None that I'm aware of though there is a restoration shop nearby that does Pebble and Amelia Island quality work and I'll inquire there. Do we assume you've already checked with the likes of Coker, Kelsey, Lucas, etc? No redline but the Bedford Famous Coach tire in that size is IMO a particularly ha...

I just saw this on AACA. Quite an imposing structure. Don't you just love the little caracitures!!

https://forums.aaca.org/topic/354024-oa ... emolition/

As the vibration damper turns, 6 degrees BEFORE you reach TDC. I'd be surprised if there were any degree gradations after TDC but just your wording in describing it left some doubt - you had said previously that you "set the main pully wheel to 6 degrees past too dead center" which would be incorrec...