Trouble with tires rubbing

[cheap67]

I was hoping for some help from you guys. I installed 2 1/2" drop spindles and 3" drop springs on my 67' gmc. I did this about 2 months ago, now I know this is going to sound stupid but I didn't have trouble with the front tires rubbing until the days when it gets above 50 degrees. I can drive to work in the morning at 30 degrees and have no problems but in the evening on the drive home if its over 50 degrees any little dip in the road the tires rub the the inner fenders. How I know there is not a lot of room under there because I am running 255/35/20 and I don't want to change rims and tires. But with spring around the corner I have to do something. So has anyone had an issue like this and or any suggestions. Thanks in advanced for any help.