differences in shakers?

[Skdmark]

Did all engines with shakers get the prop rod?  Or was this just a 383 part?

340 and 440-6 have "feet" instead of a prop rod.

[cuda hunter]

Thanks!

Were there no 440 U code shakers? 

[6bblgt]

Thanks!

Were there no 440 U code shakers?

a few in 1970

[1971Y13]

Pictures showing 1970 440 base color marked orange and 383 base you can just see under the black color where the green color mark is, I bought the 440 base at ebay, it was advertised as a 340 base, I saw the hole in the embossment area and those are on 383 only, and there were no feets on it and they should be there on a 340 base, lucky me it is a 440 base the hardest to find

[cuda hunter]

Is this a 383 shaker base?
It's a fiberglass reproduction.

[Mr Cuda]

I might need a point of clarification from the collective.
I have my 340 base with feet and a spare 4bbl base with no feet.
I always assumed it was a 383, as it had the hole for the support strut in the center pan area.
After cleaning and comparing,  the carb throat is the same height as the 340, which means it's a 440 base. Underside measures just under 1.5inch.
Did 440-4 have a support strut rod like the 383?
And what lid? It appears the base got drilled for a coyote duster style large lid.
It's odd because I removed it from a 71 383 car (early build using leftovers?)

[MoparCarGuy]

Did 440-4 have a support strut rod like the 383? No, the 440-4 and 440-6 had two 3418693 support brackets a.k.a. "feet". LINK
And what lid? A 14" diameter single 4BBL lid in orange. LINK

[Mr Cuda]

@MoparCarGuy
Your chart says 440-4 has no feet.  That is why I was wondering if the 440 has a shorter version of the 383 support rod.

[MoparCarGuy]

The chart I posted seems to have a discrepancy. The row 3 Comments for the 440 4 V says "Same base as 70 340 but no feet brackets used. Has Hemi Orange stripe on one edge to distinguish it from the 440-4V base."
That does not make sense to me either. How can the 440 4 V base have an orange stripe to distinguish it from the 440-4V base?
That is the same base according to the chart. Obviously, a typo or cut-and-paste error.

This might be tough to find out since there are so few 1970 Cuda 440-4 (U-Code) models with a factory Shaker.

[mccannix]

There appears to be a mistake in that chart.
Row 3 should read " Same base as 71 340 but uses no feet brackets.
Both these bases have the 1 1/2 measurement.
The change to the 1 1/2 base for 340 in 71 was in part because the thermoquad is slightly higher than the AVS in 1970
Speaking of measurements, when doing this you must check the top bridge and
make sure it is level straight across.
I have seen many bases where overtightening the lid causes the bridge to sink down so to speak,
giving an inaccurate measurement.
The 440 had no strut rod and no feet brackets.
The 383 base was the only one that used the rod and it was discontinued late in 71 according.
The strut rod hole was also not stamped in the later 383 bases because of this.
Many NOS or over the counter ordered 383 bases had no hole at the front.
When I mentioned the overtightening of the bridge, if you look at the first picture posted by Mr Cuda
it appears the top bridge is pulled down some but perhaps he can clarify that.
Also regarding measurements, the fact that two different top bridges where used on these bases, the earlier bridge being slightly taller.
Mr Cuda appears to have the shorter bracket, perhaps he can let us know or show a top picture of the bridge.
Also , just curious that since some drilled two holes for an oval lid use, did they perhaps drill the front hole in the base ?
Notice the divots on each side of Mr Cuda's baseplate picture, indicating where to spotweld the feet brackets if used
First picture shows the early taller bridge, second picture the shorter one.
The two pictures posted by 1971Y13 of his bases in this thread show the different bridges as well

[Cuda_mark]

Did the Hemi assemblies use feet as well?

[mccannix]

Yes Hemi bases used feet brackets and feet although like everything, some slipped through without them.

[Mr Cuda]

So, more information.
I stripped the adapter ring off and straightened the air horn bridge as it was massively bent.
The bridge is the smaller,"late" type and had been welded on. It does have witness marks underneath of the original resistance welds, and brazing for the support washer, now gone.
Definitely 1.5 inch drop, with factory punched 383 style support rod hole. That combo shouldn't be together.
Service package part? Do I turn it into a 340 with feet, or close hole for the 440 application?
I'm not shakerizing my U code and don't need a spare 340 base.

My 12/70 340 base has the large bridge. I don't know when the cutoff was from early/late.

[mccannix]

If I were to show that my friend who worked at Fram assembling these he would say that base is a 'bastard' base that somehow got into production.
He told me during peak periods lots of summer students worked there and quality control was not at its best.
Adapters rings with the nuts welded on top instead of the bottom as per the blueprint is one example of mistakes that occurred.
Your base may have been destined to be a 71 340 base with feet brackets but got sidetracked.
Not every production base had the green 383 stripe or the orange 440 stripe, only a few in the beginning until a better system of grabbing the right base for the right application happened.
Here a few 4 barrel 'bastard' bases I have owned.
Feet spotweled on facing wrong location, top base is a 340 that also had the '383' stamped hole but Fram welded it over.
Second picture of part number stamped backwards 4672153.
All these are NOS bases that I have had.
Most early 340 bases in 1970 had the large bridge and the large headed studs with shorter height threads.
Some early 383 bases also used the large bridge.
All the over the counter, later NOS 383 bases with the hole not punched that I have seen used the small bridge.
Part of the print that calls for green stripe on 383 and location where to apply.
383 base and adapter that I have from an early production 383 Cuda, adapter attached and adapter removed.
One exists for the orange stripe for 440 as well
Hemi base always the twin small bridges, never the large one

[cuda hunter]

Sure appreciate the information. 

I started this thread 4 years ago and still have not purchased a shaker set up yet. 
Seems to me like I would just purchase anything that would be the correct price and then make it work for my application.  Especially since it appears that the "correct" one would be wrong with one item or the other and need to be fixed anyway. 
I am very surprised how much these bases and full shaker set ups sell for. 

Again, thank you guys for your knowledge and wisdom.  This information is difficult to find and having it in one location sure helps spread the knowledge.