Prop shaft wise, the rear prop is a discovery 1 front prop shaft. The front is a custom made one (although apparently there is a standard land rover one that would fit) 101's tend to suffer with front propshaft rumble, So now its a double cardon on the front. Now the hard bit comparing the engines, maybe if money was no object id still be running the V8 on petrol with a new custom rad etc. After running a couple of V8 land rover's i'd say starting a hot V8 is a pain in the ***, if you dont get it right. I realize that an injection engine would be easier, due to them alway's starting on petrol then switching over to lpg etc. Ive tweaked the 300 pump a little plus it has a larger inter cooler ( 300x300 universal evo inter cooler off ebay for £57) in front of the standard disco rad. So its smooth and pulls better from low down than the V8, but there's a difference in the rev ranges of both engines. 3000 revs with the V8 would be 60mph, but 60mph with the 300 engine is closer to 3500 rev's. So at some point in the new year ive got some 4.7 diffs to fit that should level thing out a bit. Mods wise for fitting the engine, discovery engine chassis mounts, new gearbox mounts, new rad mount's (but possible to use standard 101 mount's) Longer gear change linkage, standard disco down pipe with choice of silencers added. Think that's about it really, basically ive used as much standard stuff as i could to keep costs down. I bought the vehicle in june 2010, cleaned it up etc drove it for nearly a year then changed engine in april 2011, cut body up late april. Took about a month to make the bare body in between my day job, then just worked on everything else when i had any spare cash. Put the 300 in this May, the diesel is a bit noisier inside than the old engine. So im still working on insulation. But at present its quieter than the V8 with a cracked manifold. The vehicle is getting there now, its just the odd tweak and detail now.