Has anybody had problems passing emissions so far with a gutted cat?

I'm considering doing the othe one too...

1987 Corolla Hatch MTX (junked @ 450k) 1998 Mystique V6 ATX (donated to sister) 2000 Cougar V6 Sport MTX (lemoned @ 10k) 2002 Acura RSX MTX (soon to be for sale) xxxx Audi A4 MTX (coming soon)