I am buying an MR2T clip and I need to know if the ECU will work with everything in my ST (guage cluster and stuff). I was told that it might be difficult or impossible to use this ECU and I want to check on that before getting into the project.

Also, Will the throttle linkage from the MR2T work in my car, or can I still use my 7AFE? If neither of those work out, which is the one I shall need?

Its the same as swapping in a Celica ecu, you need to rewire everything.

u want GT throttle linkage. the MR2 ECU should work fine, you will probably have to mesh some of the connectors though between the ECU wiring and the connector for the accessories/displays.

what do you mean by 'mesh'?

Also, do I need all of the GT motor and transmission mounts?