the sump on the 1g-gze is the mid sump so it clears the steering but requires a bit of the cross member trimmed,
i went the whole hog and removed a larger section to sit the motor as low as possible - really low, but i still required the gze intake manifold as it is about 50mm lower than the gte manifold. now there is about 25mm clearance.
oh yeah, mine is the 82? model t18 with the metal bumpers - at least they were, they were turned to scrap by about 1000 parking prangs - previous owner (of course!).
i got a 1g-gze complete with computer for $1000 from jeff at SSS automotives in nsw - cant recommend him enough, on time and in good nick!
once the car is on the road ill post some pictures. if you need any progress pictures or info email me on stonemanracing@hotmail.com and ill try to help.
final thought- cost: $4700 (but i bought a 1g-gte before realizing the rear turbo was never going to fit - so knock off $900.) worth: probably less, but damn it should be fun to drive!