how much of a performance drop is the k series and what is the price drop ?
to be honest i havent got a clue about K conversions, 1.4 is about 100bhp i think? Pick up an engine for about £200-300. Best bet is to have a look in the rover section on 16vminiclub, and the gallerys for ideas and whats involved because you'll probably be looking to do it yourself if you want to have it done for £2k