Jump the connectors right under the dash the furthest right ones, on the top and bottom with the ignition turn to on. count how many times the check engine light blinks, 1 long = 10 1 short =1.
and check out ThirdGen.org For some help. goodluck man, I currently have my project which is an 85 Z28 and I can't wait to have her on the road with the 305 running nicely, but when I throw the 350 in there, she will be a new car.