Better yet would be if you could put those 325s (anybody's, not just Contis) on 12" wide wheels.I'm using a 305 and 325 on the Ford pp2 replica wheels with continental ecs.
Here's my experience...I agree estetically it looks much better than 305 square. Front and rear look properly matched now. There's tons and tons of grip on straight ans fast sweeping corners.
On the downside I feel the rear wiggling a little bit when taking corners where there's elevation changes. I believe this is due to the tire bulging just a little and the contis having a very soft sidewall. This is more evident when tires are on lower psi.
These tires are excellent in most situation but focusing on handling If I was to do the 325 on 19x11 again I would probaly look for a tire with stiffer sidewall than contis ecs.