five
2 or 4
Yes the front seats from a 89 mustang v6 will fit in a 91 mustang, the tracks are the same.
There are seat belts for ( 4 ) people
Yes.
Sit Down
Yes.
Ford Mustang seats can be replaced by taking out all the screws, removing the seat, and placing in a new one.
Yes
2 seats in the front 2 seats in the rear.
The 2008 Ford Mustang has 13.0 cu.ft. of cargo capacity with all of its seats in place.
The 2006 Ford Mustang has 13.1 cu.ft. of cargo capacity with all of its seats in place.