The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
The answer can be found at www.dippy.org. I just did this last week
The firing order for a 1985 Chrysler Fifth Avenue with a 318 c.i. engine is 18436572.
Try nada.com
18 Gallons
$300 - $400
15 to 18 mpg
35thousants.
The fuel filter on a 1985 Chrysler 5th avenue should be below the alternator on the passenger side of the car
NoNo
The dash has to be removed to gain access to the heater box. The heater box then comes out and is split open to replace the core.
depending on the accessories under the hood, it weighs approximately 3600 lbs.3300 - 3500 lbs (wikipedia.com: look up 1985 Chrysler 5th Avenue)
leaking wheel cylinder