hey im thinking of buying a escort cabriolet with full cossie kit, its a 1.8 xr3i and im weighing up my options, how difficult would it be to change it to full frst engine,managment etc or would it be better to turbo the standard (57k) engine thats already there, i reckon the frst engine has more tuning potential but i just want some more advise or ideas.cheers chappys