I'll have to get the alignment rechecked but when I rebuilt the front end last year got it set to 0 on camber and toe with +2* caster and always tracks straight, but looking at the wear on the inner tire looks like it was sitting on the outer edge... with a BBC and skinnies the outside does wear quicker from turns but I didn't expect that wear from going straight... I did take about 80 lbs out of the front of the car with the new motor and radiator... maybe this accelerated the problem?

I noticed the last couple weeks the tread was wearing low (~2/32") and added the tires to my list of projects for the winter... didn't think one would go on me this soon though...