Thanks for the tips guys. All looks OK so far, but I will check the towers carefully after cleaning, and before refitting. No leaks, but the rack is quite dry. I fitted some new boot clips, and will refill with oil before it goes back.
When I stripped off the transmission from the engine, I noticed there was a lot of old oil inside the bellhousing. Difficult to pinpoint the source, but I know the oil pan bolts were loose, and some may have come from there. But I dont want to take chances with the new clutch, so I am going to replace the rear crank seal; what a big job that is!! Remove crank pulley, damper, front cover, oil pan, then remove all crank caps and crank. There is not much more to go now before the whole engine is stripped!
But its just as well really, as, although the engine runs good, the gaskets are all hard, and the timing chain is well worn, so they will all get replaced.
I cant help getting the feeling I will end up with a full recon job though.