Hi, my name is Val and I'm new. I'm trying to figure out what year 911/912 to buy for track days and weekends. I like 911s before 1989. My 911 books list changes from year to year, but don't really explain their effect on handling. My priorities in order are (1) Handling (2) Reliability (3rd) Power. I don't care about comfort or modern convenience. If anybody's willing to field my questions or point me to a resource I'd appreciate it.

1. Can an old 911 be updated to handle as well as a newer 911?
2. What years resulted in a "quantum-leap" in handling?
3. Are there years that are too old to update their handling?
4. Years that would be stupid to modify, i.e. fender flares?
5. Are there years that are so old they're ridiculously expensive to maintain, difficult to find parts for, and undesirable to race? In other words, strictly collectables.

Thanks, Val