Hesitation when I blip the throttle??

[rusty ol' 69']

When I gun my truck it hesitates then kicks in. I searched this site and got several conflicting ideas. Mostly about the accelerator pump, but when I look down the barrel and push the throttle gas squirts out both sides in a steady stream. So that's not my problem. Then I found the choke might not be opening so I held it open and fired it up, but it still hesitates. So the carb is good to go. I think my problem is ignition related. So besides the vacum advance what else could cause this. If this isn't enough info. to make an educated guess ask me what would help you to better understand my dilema. It's getting irritating and I want to narrow down the problem. Thanks for any help in advance.

Rusty