Sorry, no pictures in this update but now got most of the wiring issues sorted. It was mostly down to earths, there are 3 which go on the engine block that had not been connected (due to there being no engine yet!) and these were causing all kinds of weird problems like indicators coming on instead of headlights. For those of you familiar with Alfas of a certain age, my car was fitted with the Alfa Control panel (a series of additional and generally spurious warning lights). I decided a while ago to delete this function and have a small storage cubby hole instead as featured on models without Alfa Control. I have now discovered that the main wiring loom for cars fitted with Alfa Control is totally different to those without it, and having carefully studied the wiring diagrams it seems that a lot of wiring goes through Alfa Control and some items (such as rear lights) will not work if it is not present. A replacement is currently winging its way to me and will hopefully resolve most of the outstanding issues.
If anyone has been inspired to try a 33 for themselves, this one may be of interest.
http://www.alfa-pages.co.uk/viewtopic.php?t=6978
http://www.carandclassic.co.uk/car/C422789
I think this is a really nice honest car with no major issues and really good value, decent 33s are few and far between these days, latest figures suggest that there are just 92 taxed in the UK (all versions). This one would certainly have made much better sense than my project! Don't beleive the hype about the cam belts as stated in the Car and Classics advert though, 33s are very sensitive on cambelts. That mytimingbelt.com says information not available rather than an infitite cambelt life as the vendor seems to have interpreted it. On the 16v, cambelts need to be checked at least yearly as the correct tension is vital and personally, I would change them every 3 years irrespective of mileage, I certainly wouldn't do any more than 36000 miles on them (I think that is also Alfa Romeo's recommendation). If a belt goes on one of these engines you can almost guarantee it will lunch the cylinder head on the affected bank and if you're really unlucky it may even take out the belt for the other head. Happy to help anyone if I have inspired them to take the plunge.