Hi Mike,
I saw the comment about your Elan on t'other forum and was really hoping it was just something simple and not a gasket. But although it might sound like a massive task, trust me, it's not as bad as you think. I replaced the head gasket in my Elan last winter because the water pump had gone in the front cover, and as you'll know from Miles' book, the only way to do that one is to take of both head & sump.
So, Game on. Here's my take on the job which might give you a few ideas and if not, well at least you'll know you're on a well trodden path.
1. get your digital camera and take pictures before you undo things. Wrap the camera in plastic film to keep it clean if it's not a dedicated workshop one. (it really is worth getting a cheap, 2mp camera and leaving it in your workshop)
2. check the water pump pulley for any movement. Any play at all and budget for replacing the pump as well. Trust me, you don't want to do the head gasket and then find a water pump failure 6 months later.
3. I use lots of plastic tubs and put the bolts/nuts/washers from individual assemblies in separate ones. Carbs in one, exhaust in another, etc. Soak dirty ones in white spirit, etc, to clean while you carry on. I also turn the engine to TDC before starting (check cam positions, distributor) just so that everything is set up for replacement.
4. I'm not strong so I remove as much as possible before lifting the head. If you have a hoist then you can leave the carbs in situ, but I tend to remove carbs & exhaust, cam sprockets to free the timing chain, but leave the cams in place.
5. Remember the little bolts hidden underneath the head itself at the front cover !!! (now ask me why I mention that)
6. The timing chain slipper pad is a nuisance, the angle it fits at gets in the way of a straight lift, you need to pull slightly at an angle once the seal to the block is broken.
Remove head gasket. Put in padded envelope. Send to previous builder....
As the Haynes manuals are fond of saying "to replace, reverse the dis assembly instructions" Actually, it's not so bad as it sounds, you just need to take things slowly. I think I took a week over mine doing a few hours each day and not rushing. The only tip I can think of at the moment is to get 2 lengths of rod, threaded at one end if possible, to guide the head into position and keep the gasket located when you're putting it all back together.
Call in often for tea and sympathy......