Fantastic conversion i ran one on my old fiesta then Blackierst ran one on his and they work fine and at the sum of £23 i payed for my rad, if you don't want to run water cooled then go for the fiesta si radiator but there is slight mods you have to do to get it plumbed in and fitted:
you have to cut into the front panal on the drivers side just so the end tank slots in so it leaves a gap at the opersite end for the intercooler pipes to slot through and you have to modify the hose from the header, basically just cut a section out and straighten it up and use a xr2i top hose, peice of p*ss to do and the temp went right down under half way, also the standard fan is to deep so i went for a spal 12" fan and that did the trick.