BF Goodrich KDW vs KD

[GeoffP]

Anyone who's owned KD's and KDW's, I'd love to know your opinion regarding the handling differences between the two. Specifically, I'd like to know KD vs KDW 1's not 2's. I know that KD's are side specific and that they have a treadwear rating of 200 rather than the KDW's rating of 300. I know nothing other than that. I've currently got a brand new pair of 245/45-17 KDW 1's on the front of my 68 and am shopping for a good replacement for the 275/40-17's on the rear. Currently they are Sumi HTR-Z's (original HTR's). They're about worn out, plus they don't meet the treadwear requirements to compete in the Auto-X at RTTH, so I'm shopping for tires. I would really appreciate anyone's opinions on this because I had planned on buying new KDW 1's for the rear except that I can't find them anywhere anymore. They were semi-abundant in Feb when I bought the fronts at a great deal. One thing to know is that I have a very minor rubbing issue on the driver's side rear with the Sumitomo's, so I'm not 100% sure a 275 KDW would even fit without a 1/4" spacer added to the rear. I'm considering 255/45's as an alternative too. I hope someone will chime in on this as I want to place the order for something on Thursday.

Thanks!!