The front seats of a 1968 Karmann Ghia are generally interchangeable with those from the 1966-1974 Karmann Ghia models. However, slight variations may exist in the seat frames and upholstery styles. It's always best to check for compatibility, especially if you're considering using seats from earlier or later models.
No.
68 and down
Yes, the Karmann Ghia came with factory disc brakes in front, and drum brakes in rear.
Not at all Ghia bumpers are unique to the Karmann Ghia. Beetle bumpers only fit the Beetle models.
no 68 seat tracks are wider than the 69and up ghias
1963
yes I would not recommend doing this, as the seat frames are different, a bug seat is higher than a Ghia seat, not sure if the bug seat and ghia seat have the same frame rails, however, might be a problem with headroom. The Ghia is substantially lower than a bug, the front seat area is both wider, and a bit longer than on a bug, and seats would generally not be considered interchangeable.
A 1958 Volkswagon Karmann Ghia
It is possible you are referring to the Karmann Ghia, a sporty vehicle from VW that was designed by the Ghia studios and with a body built by the Karmann coachworks.
One might find images of the Volkswagen Karmann Ghia in Car and Parts Magazine, September 2005 issue. The Car and Driver magazine in 1972, June issue, talks about the Volkswagen Karmann Ghia. You can also find images by typing Junkyard Find:1970 Volkswagen Karmann Ghia.
KIA, Karmann Ghia
KIA, Karmann Ghia