Hello Nick
Your wheels look very nice. Earlier this year I fitted 165/80x14 Vredestein Classic Sprint tyres in H rating to my Sport 1600, and have been very pleased with them - slightly harsh, but quiet and good grip and feel. However they are on Flavia 5.5" rims, and I just wonder if fitting them onto a 6" rim might be stretching them a bit far? (Have others any experience of this configuration?) I would definitely recommend that you do stick with a 80 aspect tyre as the sidewall compliance is an integral part of the suspension springing and damping rates. Although there might be clearance problems, and the gearing would be raised about .5 mph / 1000 top, you could consider a 175/80x14. That section will sit nicely on the 6" rim, like the 1600HF.
The wheels have no safety rim built into the bead, and therefore in the event of a puncture, the tyre can slip into the well-base and come off the rim. That is the theory, anyway! I have never had any problems using a tubeless tyre (as the Vredestein is, although the ZAS is not) on Cromodora wheels, and seldom does a fitter even raise an eyebrow.
You could also have a look at Mytyres website, who supplied the tyres only to me at a very competitive price and carriage costs. Fitting/balancing is about £10 per wheel. Use a fitter who supplies new alloy wheels - they tend to take better care fitting as they do not want to damage a new wheel for a potential customer.
Regards - Roddy