Grady,Hard to say. These are the originals from my T/A and I also attached the page from the 1970 Parts Manual showing the part numbers for them as well (Section 2-10-55) Sorry for the photo from the computer screen but I think you can see it. Possibly different vendors provided these types of parts and may have varied from plant to plant.
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Ok so I looked a bit closer at my ball joints today. I too have the Dave Wise books and use them as a guide, not as a bible. There are many inaccurate things in all those pages. That being said, his information makes reference to the part number being cast into the arm and there is a photo of a lower ball joint with a number which has been enhanced with typed in numbers. The part number showing isn't even a good part number according to the chart on the same page for all the E and B body cars. His info also mentions that the early/NOS joints will have the small threads for the break-off grease fittings whereas the newer, replacement parts will have the larger threaded hole for the zirks. Mine definitely have small threaded holes and had the break-off fittings. What do yours have?
The book references a part number on the boot. Does yours have part numbers on the boots or do they have words stamped into the rubber telling you which way to orient the joint? I'd be curious to know.
I also have remnants of green inspection paint on one of mine. Anything like that on yours?
I'm asking all these questions to try to piece together the puzzle about what is or isn't original. The best way to find out is to compare oranges with oranges here and see what we can come up with.
I'll try to get some good photos of these to post...
Not sure of the difference with the grease fittings. What was installed at the factory?
My left side ball joint is similar to my right. Number on the unit 3402991
I would be surprised if someone changed the ball joints on a 9 year old car? You never now
Not sure if they are originals.
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Are your originals worn out? If not, would you be interested in selling them?
It’s possible. Do you know if those ball joints could be rebuilt? M car is also an Oct ‘69 build! Mine is Ob157611 SPD of Oct 13, 1969. How close is your car?
That’s a coincidence! I have another question for you. You had a discussion regarding Hemi starters with another guy a while back. I just picked up a starter that is a 2875553 69 date code but the barrel is 4091975. To make this a correct Hemi starter I think I need to find a date coded 2875560 barrel. Would that be correct? I did not get the starter section when I ordered Dave Wises book.Close, Just a tad earlier then yours; 152571 with a SPD of October 6th (A06)