Point made and point corrected. My sincere apologies to anyone offended by my negligence and ignorance.
Copper

Looks your AC unit is improperly installed and............Just kidding. Jokingly joining in the Karen Kommentary! I like your garage /shop.

Plugs don't match the color of the faceplate.......I'll show myself out.

sorry for the double post the page crashed and i didn't realize i t had posted when doing so

Well as stated, I didn't meant to start a p'ing contest and just asked a simple question. I'm sorry if your wheaties are wet but it wasn't me
With that being said you may want to look at the following

LINKY 1

LINKY 2

And then there's this:
Although it is possible to use your factory stock stamped steel non adjustable rockers with the Edelbrock LA heads, Edelbrock does recommend using adjustable rockers with their LA heads. It is very possible to use stock stamped steel rockers with an aftermarket camshaft with a total valve lift of up to .500 or so. Many people have done this successfully. Although you should proceed with some caution and check that everything will work together as it should.

And last:
Best Bang For Your Buck – New Cast Rocker Arms (SEE PIC BELOW)
If you’ve bought an assembled pair of Edelbrock heads they will come with valves and springs installed. The springs are suitable for camshaft lifts of up to .575. Unfortunately, Edelbrock doesn’t make rocker arms for small block LA Mopar heads. So, we’ll start with a cast set of rockers from Mancini Racing.

If you’re familiar with the factory valve train for the small block LA engine, then you’d know that most of the rocker arms on these engines are stamped steel. You’d also know that the cast rockers were only available on the 340 T/A engine and the mighty little 273. Back in the day, cast rocker arms were the ones to have.

It’s common practise when seeking to build a performance small block LA Mopar engine on a budget, to scour the junk yards for a 273 engine’s valve train. The problem with stamped steel rockers is, although they serve their purpose fairly well and reliably, once you increase valve spring load, you could very well pierce a stamped rocker with a pushrod end.

Along with high valve lift camshafts is the need for increased valve spring pressures. Unfortunately with todays performance camshafts, the 273 cast rockers do not like high valve spring pressures either. So this brings us to the new adjustable cast rocker arm set, offered and made by Mancini Racing.

They are suitable for valve lift of up to .500-520. Which is plenty for a hot little street engine of 400 plus horsepower. If you’re looking to go this route, you’ll need to use a ball and cup type pushrod with these rockers. They sell for $274.95 as of September 18, 2020.

I asked a simple question due to my 40+ years of experiences with the LA motors and rocker arm failures. There is also the fact that we are dealing with 50 years old blocks that may have been decked, new cylinder heads, all while trying to maintain proper valve adjustment and geometry.
We likely attended different schools which is fine and I see no reason to respond the way you and some others did.
But to each their own. I'll try to remember to not respond to your posts in the future

Now we’re getting somewhere. This is the information I’ve been looking for. I know this is the internet and everyone is sitting behind a computer and not face to face so it easy to get off topic. That is exactly why I don’t like the unmoderated forum on a car board. That attitude over there tends to create tension that can bleed over to other forums. So, thanks for this new ︅Info︅. I’ll check it out. I was not aware of these at all. I’ve never had problems out of my TA rockers.

However, it’s my understand from a friend that ordered rockers for a 360 with Edelbrock heads, it takes a special offset of Harland Sharp rockers to work on the Edelbrock and Trick Flow heads. Mancini lists two different rockers for stock vs Edelbrock. So does Trick Flow. The biggest problem is no one will answer the phone at any of these places. I’ve been on hold forever and Mancini says they got Covid related work problems and to order online. No one has any products to sell. It’s all a waiting game. This build did not start out like this. The customer keeps changing his mind. 🤐🤐

Not sure where you are seeing two different rockers for the Mancini cast ones, they show one only for the LA head. No mention whatsoever about Ebrock heads.

https://www.manciniracing.com/manciniracing15.html

As for the Harland Sharp rockers, not sure where you got that info from. The HS site doesn't say that. The part number that does mention the Ebrock head also fits all stock LA heads.

Hughes says this about thier rocker kit "These rocker arms are designed for use on OEM "LA" Iron heads, INDY LA-X heads and the Edelbrock RPM "LA" series heads. Also fits ProMaxx Head."

I would also comment that years ago we 9 being a grup of50 or so) experienced 2 issues with the 273 rockers on a 340/360.
1. The 340's had a larger valve spring/ retainer. This would interfere with the rocker in the area circled. a couple of passes on the grinding wheel would usually fix the issue
2. They were prone to bending at anything above a stock 340 valve spring pressure.

Another tidbit on rocker arms. The early 68 340's used stamped 318 rocker arms. It was soon discovered that they had the same clearance retainer issue. The motors ran fine but would lay down a bit at upper RPMS. When this was discovered the rockers were revised and actually had a grinding mark visible on the later 68 motors. I might have a couple of each laying around but would have to dig for them.
So if any have an early 68 motor untouched you might want to check the clearance. Somewhere in the 69 to early 70's the stamping die was apparently changed to allow the needed clearance. See pic's

Didn't they thicken up the material around that time to address the pushrods thru the cup issue? Or was that just the B/RB's?

No fire extinguisher mounted nearby? I love that you have an American Flag hanging

To answer your question sniper, the iron Mancini rockers does not mention anything other than regular iron heads. If you look on the bottom of the Harland Sharp listing of the Mancini website, it shows different rocker for the Edelbrock rpm heads. Trick flow says to use those same rockers I believe
I did call Hughes and they said they were just getting started producing a rocker that would work on all of them. They are almost as much money as the Harland Sharps.

Not sure on that one

I just noticed the wear pattern on the tip of the single stamped rocker , just a wee bit of a geometry problem there

Yeah, wasn’t that a Mopar Performance claim? ….that the rockers sold in the 80-90’s were thicker and rods wouldn’t punch thru?

Having compared the rockers from a 64 413 and a 78 400 I can verify the 78's were thicker.

I can't say the same about the LA's though, never had the opportunity to do that since I never owned an old enough LA with stamped rockers.

B/RB

The regular HS rocker is 1.44” fulcrum length, chrysler factory geometry.
The short HS rocker arm for the Edelbrock heads has a 1.38” fulcrum length. Same with the steel PRW rocker arms.
The aluminum Mancini rocker arms made by HS are 1.42” fulcrum.

I email Harland Sharp and asked…

Correct, I don't have one, I have two! hahaha
One at each entrance and accessible (when doors are open) from inside and outside.
Copper