Cheers for the help guys,
I replaced the oil seal today, got everything bolted back together, Those C-shaped clips that hold the downpipe to the manifold are an absolute arse! Why couldn't there just be a flange with some bolts!!!!!! took me ages with the little tool, and the clips and the inaccesability and wiggling and the wahoyhoy.

Anyway, being a novice really with cars this is by far the most major thing i've ever done, i've only really dabled with changing exhausts and little bits which are a doddle. I was really pleased with myself, got it all done and then filled it up with oil, no leaks! filled it up with water, pissing everywhere! one of the hoses which bolts to the head had not been tightened properly coz the bolt rounded like every other rusty nut on my car!

Gona have to wait a few days now coz I need to give it some hasstle to get it out and put some new uns in. Theres always sumet int there, just when you think your on to a winner...