Escort Boy 1

Hi all very shortly i shall be purchacing a van for myself to run to and from work and to use for delivering bits and pieces, now this is simply a compramise for me as my missus wont sell her beloved ford focus so have to settle for a practicle van, i am not wanting to keep the diesel lump in there and am looking to either rs turbo or zvh the car, how simple is this to do and what parts are needed, i know i would have to change fuel tanks but could i just blow out the existing fuel pipes of diesel instead of changing them, also is there any wiring issues im going to come across?? many thanks, any info or links about this conversion are much appriciated