The 245/50 blizzak LM-22s on the car now feel better than the KDWs.
When I bought my 93 Z28 it had the chrome 17" vette rims with 175 TAs. with the SLP level II suspension and the Doug Rippie revalved Bilsteins the ride was terrible, and the handling was twitchy. I sold the chrome wheels on eBay and bought a set of firebird take offs from SLP with `245 goodyear GAs. The handling became neutral, the ride was much better (i know 16 vs 17).
I am no fan of goodyear, but i think they are better than the KDWs on the GTO.
We have to see what Groucho puts on his car with his new long commute, and how much better they are.