Ray we are both at similar stages. I have considered just plating up the airflow vent thing totally, it has been suggested on this site before.
If you were going the replace the vinyl roof, obviously it would be easier to do a repair job, as half would be hidden.
Re the 32/36, I just purchased a reco one yesterday on ebay, the new copies are readily available.
but have you seen the retroject kit?
Fuel injection in retro std weber body:
http://www.webcon.co.uk/shopdisplayproducts.asp?id=957&cat=Retroject