my 86 Z-28, is getting very tired.I'm thinking of buying a used motor (350,3rd or 4th gen), and swapping. So far i'v read; change knock sensor, injectors, wiring(?). Problem is I haven't found a used complete engine let alone a long block. Kinda new to the electronic age, car wise. just looking for the best way to go if i can locate an engine i would like to drop in there.If i buy new(engine)what are the bests some of you have found? anything else i'm missing, i'm sure there is.......