I did the job on Saturday, and it all went pretty well! Engine now running smooth as silk, well, 20 yr old silk anyway..
I am extremely grateful for your help and encouragement without which I certainly wouldn't have had the courage to even have started the job..
Couple of points:
Couldn't find a carb kit, so didn't dismantle the carb, or in fact even disconnect all the cables. Just sort of folded it all over the other side. The bottom carb gasket sold to me was not precisely the same size. It was slightly larger (abt 2 mm radius). I will order the right kit and then thoroughly clean the carb later..
The manifold gaskets were new, and went on well. I did use a little gasket paste on them.....
I do not have a torque wrench, so did the two bolts on the head by 'feel'. Certainly not enough to strip them, but pretty tight. Should i invest in a torque wrench to check that?
Anyway, its going like clockwork, and I thoroughly enjoyed doing it. I wish you'd seen the look on my wife's face--she was astonished when I got it all back toether again!
Thanks again for your help!!