If I recall correctly, there was an idle solenoid (and bracket) present on a 70 440 4-Barrel Carter Carburetor, but is there one present on a 70 340 4-Barrel Carter? I see they reproduce the idle solenoid bracket for 340 Six-Pack, but not 4-barrel applications.

Yes, should have the same bracket, solenoid number DR1114442

edit double post

To clarify, Same bracket between 340 4 bbl and 340 sixpack.?
Is NOT the same

between the 2 four barrel applications mentioned it is ( and not easy to find I might add))

Nope, I was talking about the bracket that fits 340 & 440 AVS carbs are the same, solenoids look the same too, just a different number stamped into them. 1970 340 Six pack, 440 six pack, and 426 Hemi, all use the same DR1114429 Solenoid with integral bracket. 1971 426 Hemi and 340 4 Barrel TQ also use this same DR1114429 solenoid.

Here's one Scott restored for me awhile back.

While discussing the idle solenoids with integral bracket there is also the Mopar one application only DR1114443 71 440-6 solenoid.

Yea, that DR1114443 unit is a rare one....Those were also on early 72 340's.