I've had my '83 for a little ove ten years now. T-top, 5 spd, NA coupe. I finally started really tearing into it at 274k miles. As she sits now:
Flat top pistons with N42 head.
Balanced internals, ARP Studs and Rod bolts.
Z31 ECU with Nistune. (Still wiring)
Much more stuff, but I'm too lazy at the moment.