Engine hesitation at WOT

[DMZ73]

Hey gang! Its been a while.
For those that don't know, I have a 73 Challenger.
My engine is mated toa 360 engine and 727 trans. I am running a Lokar kickdown cable, Edlebrock 650 Carb, Edelbrock Performer II intake, Mopar Electrical ignition. I have a New coil, new starter, new dizzy, new VR, new wiring (only 8 yrs old) New hard fuel delivery line, new fuel filter.
A month ago I replaced the trans, redid the exhaust, and went through the car tooth and nail.
Although this car season has been relatively short for me, I am certainly trying pretty hard to get the last few bugs out.
I've started to notice a few reliability/drivability bugs.
Driving the car on the freeway, I noticed it stumbled at WOT on the freeway. Not a good thing if you are getting on it to merge into traffic!
The stumble happens at about 50. When I back off the gas it goes away.
any ideas on what to check?

Thanks in advance!

Dan

[cudabob496]

high speed stumble for me turned out to be dirty distributor cap contacts

[EMCD]

I had the same stumble, it was the cap and rotor. easy cheap replacement and I was back to normal.

[Bullitt-]

Secondary Air Valve opening to quickly possibly   ... http://www.superchevy.com/how-to/engines-drivetrain/0501sc-edelbrock-carburetor/

Adjustment to slow

[Chryco Psycho]

The air door is weighted not sprung so there is no adjustment unless it is a Thunder series
 low float level is another possibilty

[DMZ73]

File this under "WTH"
The hesitation/stumble seems to have disappeared
🤔


Sent from my iPhone using Tapatalk

[Bullitt-]

File this under "WTH"
The hesitation/stumble seems to have disappeared

   Carbs are funny that way...fuel quality, piece of trash stuck somewhere ..
 Ya got no computer covering things up.