To run a 1JZGTE in another car there are only 7 wires to connect to make it run. The rest are connected to the 1JZ computer. You may have to add a few relays and fuses to control the power to the ECU and the fuel pump system.
Biggest problem would be the fuel system. You will need to fit a return fuel line.
Other than that there is little problems in fitting it to almost anything.