mustansally72

Hi. I tried searching for this but was unable to find anything so now I'll ask. I am new here so forgive me for any mistakes. I have a '88 2.3 Mustang LX. I am putting her into the Mini Stock racing around here and have had to change the fuel injected manifold into a carb. intake manifold. Everything ran great until this, now she is blowing blue/black smoke out the tail pipe. My question is did I do something wrong that I can't fix or is there something else that I can do to fix this.