I'm not sure how familiar you are with the ZR1NetRegistry, but there is a ton of information on the site that has been very helpful to me. On the left side of the home page if you click on General Info, then on maintenance, there will be a list pop up that will include information on such things as Tech manuals, ZR1 how-tos, common issues, ect. If you haven't used this you might check it out:
http://listserv.corvettemuseum.com/archives/zr1net.html. The search function will usually yield information on just about any topic. Again, I hope this is helpful. Ron