Hopefully someone can answer this question for me. If I were to rebuild an engine to make 300+ HP on say a 1968 Mustang, would it still be smog exempt and need after market smog controls? Could you put on headers? What happens if you do a engine swap with a later model V8 say a 2004. Would it still be exempt because of the model year or would it require a smog because the engine is a 2004?
I want to do Auto Cross and HPDE racing and I don't know if a 68 would be a good model to do it with. Otherwise I want a 2006 Mustang GT.
I want to do Auto Cross and HPDE racing and I don't know if a 68 would be a good model to do it with. Otherwise I want a 2006 Mustang GT.