273 rocker info please

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mad dog

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hello FABO, my buddy Dave task me with identifying a tote loaded with different 273 rockers, I am going to use a set on my 340 build but not sure whats in the tote.
They have different numbers on them and i hope someone can shed some light on exactly what he has, i will post the numbers ...
Any info on these would be appreciated, is one set better than the other?


2465380... many of these
380.... many of these also
S1....
S2....
 
Picture of the rockers

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mad dog Is there anything (stamping) on the opposite side of the rocker arm?
 
Dave, yes there is a W followed by a 2 digit number on the 2465380 rockers
 
no they are different numbers, i want to make sets out of this pile of rockers but not sure if they are all compatible with each other
 
one of my 273 rockers for comparison. I added more info to p[ost #3 for AAR/TA rockers.

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mike , do you remember what number is on the other side of the rocker?
 
davescuda said:
Picture of the rockers

View attachment 1716337216
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Do any of these rockers have a lock nut for the adjuster? If so they could be AAR/TA exhaust rockers (like the center one pictured in post #3)
or aftermarket like from Crane or Isky. If they are all straight, no offset, and no lock nut, They are 273 rockers.
 
mad dog said:
mike , do you remember what number is on the other side of the rocker?
Click to expand...
I don't but I will look to see if I have a photo. I have some extras in the garage that I cab get to a bit later.
 
i dont think any of them have the lock nuts, Mike do you know how to tell if one of these is no good, other than obvious damage
 
mad dog said:
i dont think any of them have the lock nuts, Mike do you know how to tell if one of these is no good, other than obvious damage
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Loose adjusters or galled bores. The bores should be smooth. Damage is obvious.
 
If I understand right you want to match sets. From my understanding, they are all cast pretty much the same and out of the same material. I believe the only difference will be from machining tolerance variance and if they are bushed with bronze bushings or not. You may want to check weight of each one to make sure they are all uniform. To match them you would have to check lift in an engine or a checking fixture.
 
mad dog said:
mike , do you remember what number is on the other side of the rocker?
Click to expand...

toolmanmike said:
I don't but I will look to see if I have a photo. I have some extras in the garage that I cab get to a bit later.
Click to expand...
I didn't look at them all but they were all over the place as far as stampings. A couple had the part number and others didn't. If I were you, I would inspect them and match them up as best that you can number wise. Photos coming soon.

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Be sure to use the banana groove shafts.

You will need to grind clearance to use them with stock Edelbrock valve springs. Other aftermarket heads may need that also. Or you can be smarter than I was and switch to beehive springs.

In my case Mike @ b3 recommended .030 clearance between the keeper and the rocker. It is easy to check that with a piece of welding wire.

:thumbsup:
 
Uncle Bob said:
Be sure to use the banana groove shafts.

You will need to grind clearance to use them with stock Edelbrock valve springs. Other aftermarket heads may need that also. Or you can be smarter than I was and switch to beehive springs.

In my case Mike @ b3 recommended .030 clearance between the keeper and the rocker. It is easy to check that with a piece of welding wire.

:thumbsup:
Click to expand...
Beehives for me next time. No grinding needed. I have seen some scary clearance grinding on these and aluminum rockers.

100_5227.JPG
 
64 1/2 - 65 273
66 273
67 273 - 318
From what I have seen reconditioning them the Later style are different and to me look stronger. I noticed the difference when cutting them for the lock nut adjuster.

Some need to be cut deeper depending on the adjuster style and lock nut your using. I used MAX wedge adjusters that I have here. Many don't cut the surface at all for the lock nut when using longer adjusters. But while machining them I found that they are not all parallel and the nut does not fit flush on the raw forged surface.

Banana Rocker shafts are also different through years.



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Adjustable rockers on a 67 318? LA 318's weren't available until 68 in A bodies. The Poly 318's had solid lifter cams but the LA Teens never did and the Poly rockers weren't anything like the LA's were,
 
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Well I hate to inform you I had several 67 belvedere and Coronets I stripped with LA 318 solid lifter motors All my 62 - 66's had poly 318's .

I first came across one in my father in laws 67 belvedere. I was changing his valve cover gaskets. And yes it was a LA 318 I looked. I adjusted his valves for the first time since he bought it.

I was his Hero, It was never that smooth and quiet. That is when he left me marry his daughter. Should have never changed them gaskets!!!

Poly rockers are totally different engines and only 2 valve cover bolts. I may have seen one or two in my 70 years. LOL
 
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Oldmanmopar said:
Well I hate to inform you I had several 67 belvedere and Coronets I stripped with 318 solid lifter motors All my 62 - 66's had poly 318's . I first came across one in my father in laws 67 belvedere. I was changing his valve cover gaskets. And yes it was a 318 I looked. I adjusted his valves for the first time since he bought it.

I was his Hero, It was never that smooth and quiet. That is when he left me marry his daughter.

Poly rockers are totally different engines and only 2 valve cover bolts. I may have seen one or two in my 70 years. LOL
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Like I said, no 318 LA engines in 67. Poly's, yes but we aren't talking about those. Their heads and valve train is completely different than the LA engines. All that will do is confuse the OP and anyone else that reads this thread.
 
You brought up the confusing poly engine in post #20. I just told you I have had 67 Belvederes and Coronets with LA 318 solid lifter engines.

Again, You are the one that brought up the confusing poly engines which stopped in 66. I mentioned I had many to assure you I know what a poly engine is. Do you have any idea of how many cars I have stripped since the 70's . I am telling you that some 67 B-bodies had LA 318's and I had them with solid lifters. I really don't care if you believe me or not. I didn't pull all of these rockers out of thin air. I know where we got them.


I see you corrected the spelling of poly in post #20 LOL . That's 2 , Gotcha
 
My last post on this thread

The best factory equipped standard mopar LA adjustable rockers I have seen as far as quality is 1967 273 and 318 LA engines "Yes 318".

I never had a set off a 66 LA that was original. I never stripped one so I have no info on them. But the 64 1/2 -65 to me looked weaker do to being thin. This is just my opinion from what I have seen over the years machining them. Also some of the banana groove shafts only have one oil hole. Some have two. We always drill the second hole.

My rockers are all at the new shop or I would get the numbers off the sets that I feel are better to use.

You can visually see the difference in these two neither were machined yet. You can see you will not get a nut on the one to the left without cutting it. The taper comes right to the edge of the hole for the adjuster. Also look at the width of the threaded boss and the oil hole for the ball. I took these pictures years ago to send to my son.

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