I had a dyno done and it made 153.7 hp and now I want to get over 200 hp. So I was thinking of getting a full engine rebuild with the following Mace products:- 20 thou over sized pistons, port polish shaved heads,port polished intake manifold, stage 2 cam

This would very likely be possible.We could supply a base tune to get you running, however I would recommend that you get a custom tune done to suit.As long as your current injectors are in good working order and cleaned, then I wouldn't worry about upgrading them. Otherwise a good option would be a set of 36lb injectors in conjunction with a custom tune