Get your info right.Anything will fit anywhere if you can fabricate/weld/spend money lol. But it's a waste as the slowest mki/mkii (older) are more powerful than the 1zz. I'd sell themotor if it were me.
The Mk1-engine is placed more to the front/middle. Engine sits right behind the seats. And it does not have to store a softtop. There's more room in an MK1-enginebay, if you ask me.The MK1 has more useable room on the Inside for the People than the Mk3, and is Smaller on the Outside.. How does that happen.. and it has an Enclosed Trunk and Frunk..
The Spyder ECU has the Immobilizer.. and unless you want to do some exotic cobbling of pieces or Alarm Systems to defeat it, the Corolla or Celica ECU for the US marketts has no Immob... this makes the Install simpler.. I'd use the Spyder Wireharness for the Engine, and that would put the ECU next to the Left Side Tail Light, rather than the Right Side that the M1 is on.. The Wiring Harness ( Loom ) on the Mk1 exits next to the Alternator to get to the ECU.. not fun to work on..Cap, why a Corolla or or Celica-ECU ?