I replaced the clutch plate in my 91 a few years ago, and drove it home with the issue not fixed. I don't know much about these cars, and I'm having trouble finding info/parts. On the short (~30 minute) drive home, the car overheated once and we had to dump water bottles and a little anti freeze in, and it was still not shifting unless I rev-matched while pushing the clutch in. I replaced the clutch plate with an Auto-Zone product, which I've read aren't reliable and don't work most of the time, I don't know how true this is. I also messed with some clutch adjuster thing and couldn't find victory there. The car is completely stock other than metal sockets on the linkage for the shifter, and it's lowered a tad. What else could be wrong with my SHO, and where can I find parts? Note, It's been sitting since that day. Is there anything I should look out for after sitting other than things like fluids and tires?