A coworker offered to trade their 89 gt for my 05 v6 and I was looking for some advise. Both cars have about 136k miles and regular oil changes and maintenance. the 89 has a redone interior but has transmission issue that they'll have fixed if I agreed to trade. I was wondering about the life expetency of both cars and if this would be a fair trade and would it be an upgrade or down grade for me?