you need a 2wd cos engine loom this plugs into the saph main loom so has a connector for power etc so you can have just the engine loom theres 4 wires that will need connecting into your original rst loom

will need to change the to outer wires round on the tps and run an pf09 tps

then lengthen the cables as you need then

engine loom shold come with a bung on it the ecu should be fitted inside the car i have mine in the clove box and drilled a hole to the left of the battery as you look at it through the bulkhead

hth have you any more Q?
regards