Mouhahaha you ask the Q but you already know the answer !!!?!?!?! lol
There is a reason why honda put a taper on their TB.....it is like a velocity stack on your intake system...
The ITR TB is a PERFECT match with your edelbrock intake!!!!
Install your ITR TB on your edelbrock intake, open the butterfly and put your finger in to check if the transition between the TB and the IM is smooth.....I have an edelbrock IM, but when I mesure the inlet, I only get 61.xx mm....that's why I pick a 60mm tb!
Prelude tb cost<itr tb!