yeah theres no need to take the head off with any block you have, I mean there are small advantages to be had but its not worth the effort for a std head unless the one on there has knackered stems or whatever. See if you can at least power up the starter motor on it and get the compression tested, make sure all the timing marks line up (if not possible valve dmage) Try to find out why the car was scrapped in the 1st place, ideally you want it to be an MOT fail or accident damage. If he cant tell you it might be due to engine issues. That being said 2.0 16v is pretty bomb proof, as I say main worry is timing problems leading to valve damage