are there any ongoing problems with the 1989 iroc z28 (305ci auto) ?

 

NO!!!
This type of generic question is pretty useless! If you have a specific problem post it. A 21 year old car can have any number of problems.

 

I just noticed that this is your first post, so welcome to the site!
If your looking to buy an 89 IROC, or have just purchased one and want to know what to look out for, or what problems there might be, it will help if you post that. There's a lot of knowledgeable people on this site. So don't get discouraged if you don't get an immediate responce, as there are also lots of questions being asked.