Hi all... just wondered if anyone could just verify something with me...

basically i just built my missus a car/me a winter hack and its an FRST rep based on a mk3 1.1 (with the ever beautiful HCS engine ) but its just being a pain in the ass!!
However, due to insurance/her driving, im reluctant to drop an 1800/2litre in there despite knowing how easy it is to do (did it on mine)... so i started thinking about 1.4/1.25 zetec SE engine from say a mk5 fiesta (more for reliability than performance) but i was just wondering whether this is feasable or not, i mean like electrical problems, fitment etc etc..what id bin and what to keep etc and any other issues you can think of that i should be aware of before committing my weekend to this fecking thing!!!

If someone could point me in the right direction that would be most appreciated