Thanks very much. I was able to remove the shell, and the location of the spring was apparent (along the top of the shutter assembly were two grooved posts.) For the reference of any future searches, the distance between the spring posts was about 5.25 inches when the shutters are closed and about 6.25 inches when open. I was able to source a suitable spring from the local Ace Hardware, and after extending the spring a tad and mounting it, was able to achieve just enough pull to help close the shutters. A bit of lubrication on the linkage helped too.

I've got pull my radiator/shutters apart as I apparently don't have a spring to assist closing the shutters. Am I correct that the tension of the spring should be just enough to pull the shutters closed? Or is the tension even less than that?

Also, are the shutters attached to the radiator shell or the radiator itself?

I searched high and low for a gas cap for my 31. I was thrilled to find one with Henry Yeska at Hershey 2019. His was a nice cast bronze version with great chrome. Originals look like they were made of pot metal. I think I saw that he had the locking bail wire too. I have a business card with his number on it (as of 2019) -- 484-764-6351

I found a real nice repro at Hershey in 2019 that was cast bronze (I think the originals were potmetal) for my 31 that looks pretty similar. Was made/sold by Henry Yeska. I'll look for his contact information and will repost. I recall looking everywhere for one but his was the first and only I've ever seen.

Excellent, and thanks very much. I don't think the cam gear has been altered. Is there any risk of pulling the cam gear out as I draw up the distributor drive shaft or is the gear captive?

yes it looked like a 90 degree adjustment might be the fix. it's just a square drive system?

Hi guys -- Trying to get my 31 running. Carb Doctor rebuilt the DL Model 51, Jeff got the distributor curve situated, had the generator and voltage regulator rebuilt. Tried to start; nothing. pulled the distributor and saw the rotor is about an inch off where the distributor terminal is for Spark No. 1, that leads me to conclude the driveshaft is off. Is the adjustment such that I lift the shaft, reposition until I get the rotor to line up with No. 1 terminal? I take it shaft is geared where it mates to the camshaft gear?

With Jason, be ready to be without your relay for 6 months, at least.

I've had good luck with Mike Leveillee of KM Lifestyle. Very pleasant, prompt and knowledgeable.

Here is a picture of the rotted out version of what I decided to replace. Note the bottom edge that is completely rusted out, but distribution holes still present. On the extreme right is the slot that receives the cooled water for ongoing distribution through the holes. Take a look at your block and see if you see some port or galley that logically mates to the pump outflow that would similarly receive the cooled water. It needs to be there or the water jacket will not function as designed.

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Check out this thread, which has an image of what a decent looking water jacket looks like for a 8 cylinder version.

https://packardinfo.com/xoops/html/modules/newbb/viewtopic.php?topic_id=20402&forum=1