dont you need the engines Ecu as well unless going the standalone management route? and to be fair there is some baragin donor cars about if you look remember the car can be as rough as you like as long as the engines runs sweet if you can get a good donor car for about £1000-1200 then you will be in a much better situation than just an engine and box for £800 and you could sell parts off the car to make money back
Make sure you get pretty much everything! E.g. Engine, Gearbox. Engine/gearbox mounts, Engine Loom and front car Loom, all fuse boxes, stalks (If wanted) Dials (if wanted) switches (If wanted), Drive shafts, gear linkage, Intake/Exhaust Manifold.
I think thats just about it, but people suggest to get a whole donor car to make things easier.
LOL yes you do need the ECU, i knew i would forget things! The fuel pump could help to! Also the radiator depending on you set up.
As i said i paid £900 and got everything i needed and the bloke even said if you need anything else just give me a ring and i'll either post it or you can come pick it up.