The only engines that will just bolt in without any real issues at all would be the AMC 304/360/390/401 engines from 1974-1991.
Although there are some slight emission differences through the years along with some wiring & accessories differences, they will all work.
One from an 1989-1991 would be best from a wiring stand point.
Chrysler torqueflite 727, it is a 3 speed automatic transmission.
Torque Flite 727 3 speed
NoNo
These engines are compatible. All vehicles produced by GM in the late 70s and early 80s with the 231 cubic inch, 3.8 Liter engine have compatible engines.
the Jeep Grand Wagoneer was last made in 1991. do you mean the Jeep grand Laredo or Jeep grand Cherokee?
No, they will not interchange.
No
Four door models include the Wagoneer, Cherokee, Grand Wagoneer, Grand Cherokee, Liberty, Compass, Patriot, Wrangler.
the transmission is a 4t65e and is the same transmission in a 2001 buick century...
If you are refering to the belt tensioner. I have not seen one on a grand wagoneer with a 360.
according to the owners manual for my 1987 Grand Wagoneer, it holds 20.3 gallons
This will vary depending upon the parts you are looking for. As a general rule 87,88,89,90,91 have many interchangeable parts but there are some from older vehicles that will also interchange.