doesn't specialize in Z's, you will need help. These cars are too unique for the average auto shop. I guess it's too late, but had you asked, you would've gotten advice here to find a shop that knows Z's. So stay on top of it, search and read a lot on this site. For example, there are several things you should or could do while the engine is out. For example: downpipes. Even the cheapest ones (under $100 used) offer a dramatic improvement. Also, you can find some good deals on used exhaust systems on this site.