Edelbrock Air Gap on Magnum 318 Problems

To answer your original question, I doubt the intake has anything to do with it, especially the volume of the intake. If you had an intake leak, that would affect the idle, but not cause a bog.

As others suggest, the carb is probably the culprit. Since upping the primary jets made it worse, you may be running rich at idle. If your accelerator pump is working, it may be going too rich when you accelerate. Down the road, think of installing an O2 sensor, otherwise you are flying blind.