Good plan on the move to 165/80. IMO trad Morgans aren't suited to lower profile tyres and on a 145bhp +4 you really don't need the extra footprint, if anything it makes them feel a bit heavier and less agile. On the more powerful cars of course it's a different matter, but my 165bhp 4/4 loves being on 165 tyres, I've never had the slightest problem with lack of grip.
I use the Vredestein Sprint Classics which I think are excellent, but I know there are plenty of owners out there running around on T-Tracs and are very happy with them. I believe that the rubber compounds used are the same, but with a more modern tread profile I imagine that things like wet weather performance might be a bit better with the T-Tracs.
