Cheers guys.
So far all i've done is research and lots of reading, and the only thing i've bought is a steam cleaner!
So the current plan is:
Steam clean the engine bay. There are 3 apparent oil leaks. 2 look easy to get at but the 3rd is an engine out job. I'll need to look if i can pull the engine through the front though as i will need a big ass lift to hoist it up and out!
Fix the fuel tank problems. The rubber fuel filler neck pipe and one of the breather pipes has perished, so i need to replace them. Sadly that single rubber pipe from MB is about £150, so i'll be looking for an alternative solution. It also looks like the fuel tank has had a dodgy fiberglass repair on top of it at some point which is now coming apart, so i will need to either repair this, or replace the tank. Again, a new fuel tank on one of these is £1200, so i will probably come up with a custom solution instead.
Mine's the 2.8 (although i know i said 2.4 on my first post, my mistake!). It is a lot slower than i was expecting, but i think its part of the experience! On the motorway it was fine at 70mph.
I would have though an engine swap would be really easy, but from the reading i've done there have been very few. People are saying that because it's such an old car with no electronics etc, fitting any kind of modern engine in it is very difficult. I find this hard to believe though as surely you would just rip everything out and replace with modern kit? Anyway, we'll see.