Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

hi i have a 1.2 single point injection corsa and a write off 1.4 multi point astra
what will i have to change on the corsa for the engine to work i no i will have to change the ecu .. what else will need changing?

ecu and loom, everything else will just drop in. gearbox can stay the same.

is the loom easy to change or will i have to remove all the dash?. n will it jus be all the wires that plug in to the ecu that i remove?