I had a similar experience the other day. do a quick datalog and look at your battery voltage. In my case I was getting surging at part throttle (smooth at full throttle) and I noticed that my voltage was changing from the typical 14V down to 12V when the surging was happening. I ended up tightening down the alternator cable and it fixed the problem. That may not be what is happening for you but it's a quick thing to check. I also have the Delicious tune but I'm running a Harrop rather than Edelbrock.
-Matt
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