Hi..Had the same when i did my HGs...P38 4 litre Thor....The kits tend to be a bit universal i.e. will suit more than one Land Rover/ RR engine....in my case they were surplus to requirements and were not needed.
Kind regards
I think the 8 bigger ones are injector seals of some description for older (Lucas hotwire?) EFI - The others, I *believe* are for things like the water feed/return from the inlet manifold - again on the older (maybe 3.5 or pre serpentine) engines. I had them left over on mine (thor) too...
Nice shiny engine - did you go with top hat liners?
That was mine before I fitted it nearly 2 years ago... It's not looked that clean since!!
The tray under mine in the picture was actually from parts washing/de-greasing - I had bought a number of second-hand parts which I cleaned up/ refurbed like front cover), so the tray was where I did all that in the garage.
Mine has a random oil leak though, but doesn't seem to drip too much!