Shoot carb cleaner through the passages.
If it goes in one end and out the other so will lube oil when the motor is running.

And it maybe a good choice rebuilding and re using the parts that you have. There is no guarantee that NOS parts are good. When I rebuilt the slant back in 2012 that was in the 83 D150 I used NOS rockers from Mancini that I purchased from one of their close out sales. These were new, in Mopar boxes / sealed bags dated 1990.
One of the rockers split open and failed in less than 5000 miles, had a defective weld, looked like no weld penetration. I always thought that it was crazy that defective part sat in a box somewhere on a shelf for over 20 years waiting to find its way into my motor.

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Doo Ron Ron and the Duke of Earl are friends of mine.....
https://www.youtube.com/watch?v=uX8Nj8ABEI8

The passages goes up to the shaft sleeve (bushing) that was pressed into the stamped, coined, then folded rocker arm body. The oil from the shaft goes thru a small hole in the sleeve and travels along the outside of the sleeve to the coined passageways, thru the passages and out the top and the tip.
You can push a small wire thru the tip opening and up to the sleeve, but the wire stops there, unable to make the sharp turn at the sleeve.
DD

That's great news! My arms are in much better shape than I thought. Still gonna ultrasonic clean them to get the last of the residue removed.
Thanks for sharing your experience and knowledge.

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

As I was cleaning and scrubbing the arms, I found a huge difference in one of the 12 arms. The oddball arm is the only arm out of the 12 that have a notch at the very bottom of the part on the sleeve, that faces the opposite way. 11 of the arms face one way...to the right, towards the grill. This oddball arm's notch faces the firewall.
Does this particular oddball arm have to be in a specific order with the rest of the arms OR did someone (PO) put this in by mistake.
I have pics, but I cannot figure out how to download them on this post.
Thanks!

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

DD
The 11 arms look like the one in the pic that you posted. You can see the notch right on top of the sleeve that would face the grill.

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

Bump...see my second to last post.
I can someone pics if you provide me your email.

THANKS!

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

I would check and see if the holes and slots on the inside are the same orientation as the other arms. If it is, I wouldn't worry about it. I think that notch is just to allow oil to drain. The important part are the passages for the pushrod, and valve tip oiling. That one might have had the "ring" welded in backwards. Not sure if that would put the oil passages in the wrong places.

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Charrlie_S
65 Valiant 100 2dr post 170 turbo
66 Valiant Signet 170 nitrous
64 Valiant Signet
64 Valiant 4dr 170
64 Valiant 4dr 225

The answer You're looking for is NO, You cannot run a wire all the way through until it "pops thru", it will hit the backside of the shaft bushing. The oil goes up through the hole in said bushing and then flows in the gap between the outside of the bushing, and the rolled shoulders where the arm is formed to accept the bushing. The groove is there to allow oil to flow up towards the loaded area of the bushing at lift. The 2 passages do not lead to&thru that groove. added pic of unit w part of bushing ground away, in the process of trying a mod, You can see cavity that runs the circumference.

Thanks for the reply Charlie. I was thinking that the oddball arm might have been cast for a v6 or a V8 and would be on the opposite side of the engine as the non-oddballers.
Regardless, my oddball needs to be replaced as the oil passages were either melted together or crushed together during PO operation. I found 12 more arms at the salvage yard. As soon as it warms up a tad, I'll start cleaning and working on those.
Thanks again!

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

Thank you. Very informative. Like the cutaway.

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

Just an update on cleaning the arms.
After soaking them in my parts cleaner for a day or two, I then boiled the arms in water for about 15 minutes...twice. I had a little luck freeing the gunk from the oil passages, but not a total success. The arms did look good from the outside though.
Apprehensibly, I went ahead and purchased the $86 Harbour Freight Ultrasonic Cleaner (USC) along with the $5 cleaning powder that goes with it. I wasn't expecting much based on some of the YouTube reviews.
I then cleaned 4 arms at a time using lukewarm water and the powder. After my first cleaning, I knew I had a winner. Like I said, the arms on the outside looked fairly decent entering the USC, but when I lifted the lid after the 3 minute cycle I couldn't believe how dirty the water was. This thing really works. I went ahead and did another 8 minute cycle and my arms looked fantastic.
Needless to say, ALL of my arms are free of gunk and grime and I will be assembling the rocker arm assembly today.
Hope this helps. For just under $100, I got clean parts and a tool that hopefully will last a while.

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Thom Masterson
1964 Valiant Convertible with a 1965 170...

Sweet! Thanks for reporting back!

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Rob

I’m Mater
The Kentucky Poser

We have a decent sized one at the shop and It runs up to 175 degree temperatures and I run some of the carbs for 3-4 hours. 8 minutes is a very short cycle. I am really glad it worked for you and was fast!

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2 Mopars come with Spark plug tubes. One is a world class, racing machine. The other is a 426 CI. boat anchor!

12.70 @ 104.6