I am thinking of doing a Puma engine conversion on my Fiesta but wanted to know a couple of things before I do so.

First of all I have a 1.4 Fiesta with the Zetec-S engine is it a straight swap?

Second if I get one from the same year (1997) will the wiring loom plug straight in to the existing loom in my Fiesta?

Third will I need to replace the ECU?

I am going to buy a whole Puma (rusted/mot failure) as its cheaper & will have everything I need I just want to make sure I know exactly what I need as this is the first time I have done an engine swap although my dad has done one many years ago on a different car

Thanks