> Will the parts from a '93 440 Turbo fit into mine?

Most of them, yes. And if you have access to the entire turbo car (I assume it's a crashed one?) then you can always 'transplant' all the bits you need that might be different.

> All the stuff to convert to rear discs

Not a problem. You will need to move the brakes including the stub-axles bolted to the rear axle (to get the correct mounting points for the rear caliphers) and the handbrake cables though. Not difficult. It becomes clear once you start
working on it.

Only thing to check might be if the Turbo has/had ABS or not. I'm not sure if they used different caliphers or not.

> Full turbo engine with all the bits needed to fit it

Big job! Will need to take the gearbox too. Also complete wiring harness and ECU and the related hoses and intercooler.

And while you have the engine and gearbox out of the car, do a complete overhaul on the engine (timing belt, valve clearance, engine oil seals, etc..), replace the clutch, etc. Anything that's now easy to access. If it looks worn, replace it!

Perhaps even pull the head and have it cleaned up and additionally ported and polished.

It's all possible, but will be quite a time-consuming job..

Bye, Arno.