Ok guys, finished the job and everything is working fine. I was cr*pping myself just before I switched the engine on!
I did make my own marks on the cam, crank and inj pulleys before i disturbed anything. Two marks on each one - and thank goodness i did!
I have no idea how to set it to TDC but will read the above and digest for next time(!)
With the belt off I found that the cam pulley wouldn't stay on it's mark - it kept jumping. So that cost me a lot of time.
There were no marks at all on the old belt (original Alfa) but the new Dayco belt had 3 marks which corresponded to factory marks on the cam, inj and crank pullys. I could line these marks up perfectly, along with my own markings and that gave me a lot more confidence.
Thanks for the link to alfaworkshop. i had that printed out but to be honest it wasn't a great deal of help - well, not for a numpty like me!
So, about 15 hours all in - from getting tools out to putting away. Yes, i changed the water pump too. Has cost me £140 for parts and the Ribes I had to buy. 5 or 6 hours next time i reckon. I think I spent 50% of the time just standing, looking and thinking . . .
Was hoping to get it done Saturday so I could make the north wales trip today. Oh well, the best laid plans, etc. etc.
Getting to the screws for the cam-covers was a *****. So was getting the Aux belt off and on. Oh and not forgetting the engine mount!
What did help a lot was knowing that I had you guys to consult if I got really, really stuck. never have to wait too long for an answer!
I think the Aux belt idler may have a slight squeak tho - I noticed that if I tighten it up to max it doesn't turn. Is that normal? I left if slightly loose so that it turns freely and i think it's that which is squeaking. Stops after a few seconds. Do I need to loosen it more?
I took loads of photos during the dismantle so will post them soon. I'm sure they'll be useful to someone else who has a mad moment of over-confidence!
Off for a bath and beer now. Cheers!