mk41.4

Its proving hard to get a bca replacement 1.4 engine so despite engine codes been slightly different i was wondering if it would matter aslong as same litre or if anyone knows of anyone who was used a different one successfully

My mk4 is engine code bca

Had to come on this forum to ask you guys as not had much luck on the mk4 forums! Engines just gone on my golf mk4 1.4 engine code bca... Will the lupo 1.4 engine go straight into my mk4? Any help will be appreciated