Yes, but it is a job for a fully equipped workshop.
Don't try it.
You have to take out the cylinder, how low is it, what is the difference
It doesn't drop right in. It will take some fitting but can get it to go.
According to the 2003 Ford Mustang Owner Guide : ( Motorcraft MERCON automatic transmission fluid is used for the convertible top )
TAKE A YAHOO SEARCH JUST TYPE 4 CYLINDER MOTER PICTURES.
The owners manual shows ( 5 quarts ) WITH FILTER CHANGE
The 200 cubic inch straight 6 cylinder in a 1965 Ford Mustang takes : 4.5 quarts with engine oil filter change
You have to take the door panel off by a few screws in the trim lift the panel up and pull out and it is a black cylinder
The 2.3 liter 4 cylinder in a 1978 Ford Mustang II takes ( 5 quarts with engine oil filter change ) according to my Chilton book
you need to specify the engine size: V-8 or V/Flat 6 cylinder?
Yes , you would have to unbolt the headers from the cylinder heads
take right side motor mount loose and jack motor up to get starter off.