Just as slow as before my mods..

Doesn't have the proper Mopar Edelbrock bracket, for proper throttle linkage geometry.

Could be it's not opening the butterflies full swing.

Simple 1st step.

Then if the kickdown cable is not adjusted correctly, upshifts into drive way too soon dogging it down.

2 simple things that need to work hand in hand to get some performance out of it.

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You nailed it. When driving on the freeway, it upshifts a lot into drive if at a certain RPM.