Use the 1.8 CVH to get thru the IVA test then swap it for a zetec, thats quite a popular upgrade, the exhaust exits on the same side as the CVH engine, its a very easy swap, as even the engine mounts are the same.
If you swap from CVH to pinto then back to zetec you will end up with holes in both side panels from the exhausts.
The "Package" from Ginge is well worth considering for anyone that hasn,t found a donor yet
cheers
andy