Well basically....all of it. Just take it all off including the ECM and it's harness, the cumputer controlled distributor and the computer controlled carb and stock intake. You will need to keep the temp sensor for the guage and you can leave the others there to plug the holes or replace them with plugs.

Put on an Edelbrock ect intake and a Holley or Edelbrock carb and a pre computer HEI and you are ready to rock. Oh. dump the cat converter too and put on real duals.

Tom