I picked up a '92 that was beat to death running on 5 Cylinders and had a Burnd out clutch..I guess somebody has to create them for me.. You have not filled out your Veh Info, but I'm guessing you have an Early Injector Style Z.. I can Commend you for not working on a Car you do not have the Ability to fix ( so you don't screw it up ).. But I do have to give to $h!t for running it into the ground..
Set aside some Money to get it worked on.. See if you can find local Z Guys that can either help you change to injectors and do the T-Body water delete at the same time .. as it makes the Plenum re-install SOOoo.. much nicer..
OR have the local Z Boys help you find someone that will do the Maintenance on your Z that you can afford..