I have heard that the 3SGTE throttle body (inc TPS, ICV) all just bolt up to the AGZE engine without too much modification - taking the original 50mm bore to 55mm - but more importantly, allowing replacement of the ICV as they are still available ?
Does anyone have any info on this ?

there is a tutorial on it on a twincam forum. they do bolt on, I think you will have to open up the centre bore on the intake, and you will have to make an adapter plate to fit the elbow.

http://forum.twincam.org.au/topic/24-4agze-to-3sgte-throttle-body-upgrade/