As owen said. Been using regular old cork gasket material for about 25 years now and never a problem. Why try to reinvent the wheel. Go to a good parts store and they will have several thicknesses. Buy all the paper gaskets also, and with a small ball pean hammer make all your own gaskets in about five minutes.

Well for the past two months I have had very limited time to play with the overdrive. But, now mostly have it fixed. Let me give me some info. in case it helps someone else. I kept going round and round with this because, there were three problems that needed sorting out. And with just a few minutes every so often I couldn't get it sorted out till just a few days ago. Turns out that the solenoid had a bad contact to turn the light on. The blocking ring had gotten a bit out of alignment, and the solenoid adapter plate had gotten bent.
So what you need to know about the blocking ring is that it should be aligned according to your borg-warner service sheets. But it doesn't quite work the way they say, it takes one person with the rear wheels off the ground, while the other one has his finger (and or home made rounded end rod) in the hole. While one person is turning the wheel forwards and backwards, and you are under moving the lock out lever back and forth for about ten minutes you will all of a sudden feel that the pawl will go in about a 1/2 inch more than it had before. Now with your home made rounded end rod carefully pull the pawl out, making sure not to turn any wheel or the drive shaft, because it may get out of alignment again. Which it did, and then had to align all over again. Bent the plate as flat as I could. And fixed the contact. Now it is working about 90% of the time. Now, occasionally while driving at high speed the red light may come on, and once it came out of overdrive. So may still be the slightly bent adapter plate, governor, relay, or possible the solenoid is a bit weak. But, I don't think the overdrive needs rebuilding. So anybody that can give any guidance from here would be appreciated. And does anyone have an extra adapter plate for sale. Thanks

Just hope Pete doesn't give us a lecture on the quality of the Winchell's vs. the randy's donuts. After all he was there. Are prewar donuts better than post war donuts.

Was it originally a Winchell's Donuts?

And what was that speed shop in Santa Monica, that had used parts piled from front to back and top to bottom. I think it was Shell's. But I could be wrong. Inglewood, the donut shop with the giant donut on top.

Ted Barton. I can remember, the fellow Charlie used to love to hate!

If you really want to see a mid thirties Packard roadster used alot as a tow car for a race car. You want to stay up late one evening, or very early for the B movie Daredevil Drivers. I have never been able to find a dvd or vhs on this movie, but it will surface every once in awhile on TCM, or similar network. Stars are Dick Purcell, and Gloria Blondell. The first fifteen or twenty minutes of this movie has Purcell racing around the public roads in the Packard until it is wrecked. If anyone can get a copy of this movie please let me know. Thanks Todd.
Also I believe the movie The Bank Dick, with W.C. Fields has a wonderful chase scene using a Packard convertible sedan.

Again been many years since I have had to do this, as years ago good used sending units were about 5 to 10 dollars each and everyone wanted to unload them. Worked on many cars and I seem to remember doing this once. What you can do (I think) if you have enough clip leads or wire. Is, bring the sending unit to the front seat, where you can connect it up as if it was in the gas tank, but with you looking at the gauge. The gauge acting as the ohm meter. Now you can move the arm up and down, and sideways slowly to see if you have any open spots. It doesn't take much. Or if the wiper is lifting off of the wire. Or if you have an extra battery and gauge you can do on your bench. I seem to remember opening one of these up at one time. It would have been for a prewar senior model. I think I remember bending the wiper just a bit to make up for sideways slack in the arm and bushing. Burnishing the contact with a piece of business card and some sort of solvent, probably brake parts cleaner, but not for sure. Then I believe this unit used a couple of rivets to put the top back on. Also just thought, make sure the arm is not hanging up on only one position.

It has been a number of years, but you may have a small dead spot. Take the unit out and you will need an old fashioned pointer ohm meter. Put it to ohms. Attach one probe to ground, and the other to the positive or where the wire connects. Move the float by hand and watch the ohm meter needle, watch for any sudden movements. While moving the float up and down, also a bit sideways to check for any open areas. I have in the past just bought an already rebuilt one, can't remember from where. Thanks.

I can remember some years back being at a Packards International event. The speaker for the evening was Lyman Slack. There was an article about his speech in one of the quarterly publications. He was there! He stated that the main problem was Packard being unwilling or unable to purchase extra manufacturing facilities and supplies at the time. I did a Google search for Lyman Slack, and sure enough he is in the book The Fall of Packard. From about page 53 to about 100. I am not sure how to transfer the location to here for all to see. But it looks like it is books.google.com/books?id=7d11a-EPzwMC&pg=PA53&lpg=PA53&dq=lyman+slack&source=web&ots=jbjBXg