With the prop shaft, just follow the instructions that can be found in the various Workshop Manuals, Forums and even on You Tube. if you have tools and mechanical experience, then simples.
With the exhaust, UK spec up to 1993MY was the 3.5 so the system may be different (positions of hangers).
Later UK systems for 96-98 are the same, the standard factory fit cat back exhaust system were one piece (cat back), so if the new back box can be replaced without cutting the pipe u already have a replacement system fitted.