SZ = was the NA
GZ = TT with leather seats, cruise, active spoliers
RZ = TT with cloth seats, airbags and sometimes an active spoiler
RZ-S = was a TT with electric seats but none of the other toys
are you sure its a SZ-R and not a RZ-S? It's very expensive to turbo the 2jzge motor.
The cylinder head, camshafts, intake manifolds, and exhaust manifolds are completely different between the GTE and GE engines.
The intake manifolds are also completely different in design, and again the GTE versions will not fit directly on the GE cylinder head.
The GE engine was fitted with a distributor ignition system, while the GTE engine was fitted with the latest high output coil-on-plug ignition system.
As easy as it would be for the aftermarket, the factory Twin Turbo system from the GTE engine will not fit on the GE as the bolt patterns are completely different.
The Non Turbo Supra received two transmission choices, the four-speed A340 automatic and the five-speed W58 manual. Both can handle mild transmission upgrades in power to about 400 RWHP before problems begin to surface. ( hmm yours is a 6sp )
But then ive read
1996 - the 6 Speed manual transmission in the turbo model was dropped due to emmision regulations. ( so it is possible to have a 6spd before 1996 )
but then
1997 - Return of the six-speed manual transmission.