[Glen_T]

I'm assuming this is carbureted, not fuel injected?

If I remember correctly, this is a 2 barrel carb, and I wonder if you have a problem with the secondary (second barrel). The secondary throttle is opened mechanically when you press the accelerator pecal past around 1/2 way. However, there is a vacuum diaphragm that opens the secondary throttle a slight amount prior to it opening mechanically. I wonder if you have a sticking linkage or a loose/broken vacuum hose so that the throttle is not opening when it is supposed to.

Another possible issue would be some dirty secondary jets that are not providing enough fuel as you tranistion from 1 barrel to 2 barrels open.

Hard to tell without looking at it. However, if you want to try to fix it, I'd get a can of carb cleaner and take off the air cleaner cover, air cleaner, and lower air cleaner housing. Hose down all the exterior linkages with the carb cleaner (use the small tube to direct the spray). You may want to put a rag down below it so that it doesn't run everywhere.

Another trick I used to do on my 1980 Accord was to remove the incoming fuel line at the carburetor, then dip it down to drain as much fuel out of it as possible. I would then tip it up and fill it up with carb cleaner. Then, I'd reattach it really quick so the carb would get a big slug of carb cleaner. Start the car and then let it run a little. Activate the throttle to make sure the secondary opens. It will likely run pretty bad for a little bit, but it seems to help by eliminating some gum/varnish in the carbs.

Can you leave it alone, probably. But it might be an indication of things to come, so it may be worth a $4 can of carb cleaner to try to fix it.

Also, I'd inspect all the vacuum hoses to make sure none are disconnected (or connected to the wrong places!) and if any have holes in them....

I guess you could have an ignition problem, but that usually is a very sharp miss, and I'm not sure why it would be specific to a certain RPM range.

Hope this helps.....Glen