[Christ]

Noone (that I saw) mentioned that adding a larger throttle body will do nothing but impede airflow...

Considering that the plenum it's bolted to is milled specifically for the size of TB that you were already running, and adding a larger bore without port matching it just adds frontal area inside the throttle bore, which will create a separate flow characteristic, which actually means that you'll ultimately have LESS air coming in at the same throttle position.

Using that throttle body without port matching the manifold for it will do absolutely nothing for you... at least nothing noticeable. You might lose power at high throttle angles though, due to the flow restriction.