There are certainly a lot of things that can contribute to your problem, but the torque converter is not the first item that comes to mind.
The first 2 things that stand out to me with the information provided. A)the initial timing is a little low and the curve is a little slow. And B)the CarterBrocks are often a poor choice given their well deserved reputation for drive-ability issues.
Our big blocks really respond to timing. Throw 5* to 8* more timing at it and try a test drive. No full throttle blasts with that much timing, just a short drive around to see if it helps the stumble.
And see if someone has a known-good carb that you can borrow and try.
I was contemplating same thing...adding some timing to see what effect it has. My 70RR 440-6 is @ 19base, 35 total, but has a cam and, of course, I can't swap carbs with it
Can you/anyone recommend a better replacement carb until we decide what to do with the orig AVS? I don't much care for the electronic choke on the edelbrock anyway.
