Yes the front seats from a 89 mustang v6 will fit in a 91 mustang, the tracks are the same.
Yes.
2 seats in the front 2 seats in the rear.
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Yes they will bolt down with no modifications
yes, and no. they can fit if you keep the chair rails from the 01 and install them on the 96 seats. the rails from a 96 don't match up with the 01.
A Mustang 2+2 is the way some Mustangs were badged in the 60's , meaning that you could fit 2 people in the front seats, and 2 in the back seats. It is not a four seater because the back seats are smaller than conventional ones.
five
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A 1965 Ford Mustang typically seats four people. It has two front bucket seats and a rear bench seat, allowing for a total capacity of four passengers. However, seating can be a bit snug in the back for taller individuals.
Yes.
Ford Mustang seats can be replaced by taking out all the screws, removing the seat, and placing in a new one.