Let's get this straight guys and gals. There seems to be lots and lots of confusion.
16v ABF ECU's all push fit. Easy to fit, 10 minute job.
2E 8v I'm 90% sure it's Push fit.
ADY and AGG (1994-1998) 8v is soldered in, this is not easy to do and will need someone who knows what they're doing.
VR6 I'm pretty sure they're all soldered in.