The 91 Gt I bought last August had 24K miles and had not been registered since 2003. When we did the TB and WP we checked the antifreeze and it was 100% antifreeze and no evidence of corrosion. Here is what the original WP looked like when we took it off. Guess not having mix with water prevented corrosion. I have put 2000 miles on it so far and no issues.
The car was stored in a climate controlled garage (min 55 degrees) for that time and also had radiant heated floors. It was well cared for!
