I decided to do a quick comparison of the V8 intakes available (in my garage at the moment). If flipped them all up-side-down, resting the carb mounting surface on a 4x4.
Holley Street dominator is shortest ... 3/16" shorter than SP2-P.
Edelbrock SP2-P is shorter than the Airgap and Performer by ~ 3/4". FWIW ... this SP2-P has been port matched.
Airgap and Performer are identical in height.
Here are the pics.
OVERVIEW OF ALL INTAKES:
HOLLEY VS. SP2-P
SP2-P VS. AIRGAP
AIRGAP VS. PERFORMER