I hope they have the dedicated diagnostic tool to make the ECM learn the security code and reset adaptive values which is compulsory for a V8 but i have some doubts about theyr proffesionalism if they thought that a 4.0 will run OK with a 4.6 SAI ECM just like that
BOSCH MOTRONIC M5.2.1 - Diagnostic Capabilities (UTILITY)
· Discovery Security Learn: This function forces theMotronic ECU to learn the incoming
code from the BCU in a Discovery Series II as its correct mobilization code.
· Reset adaptive values: The adaptive values should be reset if any of the following
components have been renewed or rectified: fuel injector, lambda sensor, fuel pump,
fuel rail,MAFS, inlet manifold, after fixing an air leak or if a new ECU was fitted.