yes most people remove the gze inlet manifold and swap it for a full ge one. you need the t-vis plate as well, and can either remove or keep the butterfly valves (i removed them).
though there have been some fellow aw11'ers in the us that have retained the so called crud deisgn gze inlet manifold and placed the TB onto it and acheived good results from their 4agte. here's one i know of.
here's the dyno, you can see by the list he has done 'other' mods.
http://www.mr2ownersclub.com/mr2reco.../sbawa_305.jpg
Bookmarks