One of the things you will learn with these cars as with nearly all is that have been bodged over the years, with things being added/removed especially electrically, alarms etc.

These cars do get extremly hot underbonnet, the bulk of which is generated from the turbo, as with any engine you certainly will not be able to touch it after it's been running.

As said you need to check the fan loom and fans actually work, they suffer as standard with the mentioned problems with fuses burning out and melting fuse boxes and hence a no fan situation this is due to coming on to early then staying on for sooo long, the power at the fuel pump needs to be checked UNDER load to make sure it has adequete power otherwise you can lose your engine.

The badge is different the Sierra RS being two different words on 4x4, whereas the 2WD is the traditional MK2 badge a one piece design with a black backing.

Amal valve is the boost control solenoid (Called Amal because thats the company who made them in Sweden) The idea of the "2 stage boost" (It's actually merly on/off is so you can run lower boost or full boost for your setup) at the flick or press of a switch. Easy way to tell is to drive with switch in both positions if it is this it will run lower boost hence less power than it will in the other, something of course you can only tell when you give it a bootful, it will not go back to fusebox if it is this it simply sits in the earth for the valve (Be even easier if you have a boost gauge as you can see what boost your making)

Martin