The suspention will have to be changed if not for handling then for the fact that the CVH engine weighs a lot more the the 1.1 ovh.

Brakes would be a good idea, I have a set of RS1800 calipers sat in my garage if you want to upgrade to stock RS setup (never miss a sale ), or you could go for a Cossie setup or perhaps summin bigger

As for the change of engine it's not to but a job, the basic engine goes striaght in, you'll need the loom and ECU as well and that's really a peice of piss to put in, just plug it into the right places and bang in the ECU.

You'll also need the RS Rad, intercooler and fan setup. I think you my (sure I'm right) have to change the tank, or put a pump in the one you've got.

Like DmcL said your best bet would be to get a rotten or read ended FRST as a donner car.

SORTED