Remember the tornado has a odd transaxle the engine sits like its rwd.A small block will bolt in a fiero even to the stock transaxle.I have seen one done like your thinking it was a big job he had to change the whole rear of the car and the carb was sticking out of the hood ?.First thing to do to that fiero is change the fuel lines in it.Try talking to http://www.v8archie.com/v8Archie/home.htm if you want it to handle or big brakes http://www.heldmotorsports.com/index.htm