Guys with no cats/long tube headers

Dropping my engine next week and seriously considering deleting my cats. Tig welding in a test pipe in each cats location. I know the gains are very substantial…but just how stinky will it be? Will it smell in the car? I had a carbed mustang and that was aweful…but it was carbureted.
Is it worth it? My wife just doesnt want any stench in the car (neither do i)