hi guys you seem to know ya zvh's!

ive got a standrd rs turbo running standard boost(how much boost is that?)

im going to take the engine out as it needs an overhaul as its getting very unpredicatable and a general poor drive.

while it was out i wanted to slap the mondeo 2litre bottom end on, my questios are, do i have to have a de-comp plate to lower the compression ratio, and do i have to bore the 2 litre to 2.1 to get it to work?