hey dude.. so its possible to change over just the engine and it would run fine? I was under the impression youd need the sportivo ECU, brakes, speedo, transmission, wiring.. (basically everything else) to make the sportivo engine work in a 1zz? Ohhhh, not sure about that, they are similar, but, i did swap the ECU and wiring, but the biggest issue we had was whether or not to keep the 1zz and just change the gearbox or do a whole 2zz enging swap, we chose the engine swap coz we would have had to take the engine out either way. The manual transmission fitting into an auto corolla was easy, same holes and bolts just had to make a hole in the firewall...breaks were the same, is your car now a sedan or hatch? There are slight differences in the sedan and hatch wiring from the rear electronics, lights ect...