I would like your opinions on this. I have a set of reproduction Goodyear Wide Tread GT's E70-15 that were manufactured in Nov., 2003 that I put on my '69Z for less than a year in April, 2004. Since then they have been stored in my basement where it is cool, damp in the winter, and of course they were not exposed to sunlight. I want to replace the Eagle GT II's on my Z that are 14 years old. I drive my Z about every 2-3 months for about 30 miles of freeway speed, the rest being around town at 25-45 mph. Are my old Wide Tread GT's alright to put back on my Z now, or are they too old where I should buy new ones? I have read articles mentioning tires should be replaced with everywhere from 6-10 years being mentioned. Thanks for your input.