Yeah my friend used to have a TA22 with a gze in it. Its the one in the New South Wales forum thing. He had to do a brake upgrade to disks all round which was a bit of a cunt. He used the Corona diff with the disks on the back, then used RA60 struts in the front. Passed no worry's regarding the brake upgrade. He need to fit a baffel in his exhaust as it was around the 105+ Db. Baffel brought it down to 94db i think. That was with a 2.5 inch mandrel bent exhaust.
EDIT: He had to put a unleaded fuel restrictor in aswell