I am thinking of adapting the Opel 2.0 turbo engine (204HP) on recently bought '87 Kadett GSi (2.0 115HP). What would be the success chances for such an operation ? I'll probably need the gearbox from the GSi 16V (150HP) or the Vectra turbo (if it fits). I know that with enough effort , everything is possible , but how hard would this be ?