holley 750 dp question

Hey everyone,

I have a peculiar issue I was wondering if anyone has a solution

I have a 408 4 speed . I had an edelbrock 750 on it then switched to a 750 dp. The DP is about 2 years old. The DP is much stronger from a dead stop. Accelerated hard . But when I have it floored out it seems to slow the acceleration compared to the edelbrock. it feels like I need to add another carb to get the top end to continue the acceleration as fast as it is when at a dead stop. . I do not have this problem with he edelbrock . I really like the holley for the low end performance but i am disappointed with the top end performance.

I have messed with the nozzles and the jets but nothing seems to help. The car actually performs better with the holley right out of the box vs messing with anything on it.

I may go ahead and but another new edelbrock to see if there is any difference in the bottom end vs my old edelbrock.