First I wanted to say thanks to everyone who contributes their vast knowledge to this board.
I just replaced the injectors in my 1990 with the Accels from Atlantic Speed Performance Parts (and got my free shirt with each set.) Also from the recommendations I got scouring the boards I changed out my plug wires and fuel filter and reset the ECM. I am amazed at how much of a difference it made! My Z only has 35,000 on it so I felt like it was still pretty fresh - but now it jumps like new again!
Also, I spoke to Jeff at PNWZR trying to buy the injectors and Marc Haibeck trying to buy the illusive O rings for the primary injectors, and they both confirmed that there is no need - you just use the stock GMs that are in there already. Also both of those guys were very friendly and helpful. Thanks!