MK3 AHU TDI to MK3 Cabrio swap - whats needed?

I'm looking to swap a AHU TDI into a MK3 Cabrio.

I've found a 1998 TDI donor with about 250K kms and now I'm looking for a 'rust-free' MK3 Cabrio.

Is the swap pretty straight forward? This will be my first attempt at a swap although I currently drive a 16V MK1 Cabriolet (swap done by PO). What are the things that need to be swapped? I can think of:

-engine
-drivetrain
-pedal cluster
-gas tank?
-exhaust?
-fuel return line?

Any help/pointers are greatly appreciated! Thanks!

PMed, and follow my A3-A3 thread as my swap progresses and/or stagnates.

100% plug and play on all parts, if the part is different on the cabroi put the tdi part on it, easy as that