You wil need to put your 1.6 zetec sump and pickup onto the 2.0 for it to fit. Will also need to use 1.8/1.6 zetec fiesta waterpump as they go the opposite way to the 2.0 modeo one.

Also the 1.6 inlet is restrictive and the 2.0 wont fit the fiesta. Rs1800 is one is the best straight fit mainfold. Same with exhaust manifold rs1800 item is best.

Management wise you need a DESK/DEEP/DEWY 2.0 ecu and a 2.0 maff aswell. All wirirng is the same just need to swap them over.

hope that helps