Cable shows that were originally rated “TV-MA” on cable usually don’t work in broadcast syndication (see HBO’s “Entourage” and “Curb Your Enthusiasm” as examples). The only one that was moderately successful was “South Park,” which was also syndicated by Debmar-Mercury. This one is tricky because its name can be pronounced as an obscenity on broadcast TV.
I would think if they film new episodes they would tone it down a little for FOX.