The intake manifold is an air intake. There isn't something that you refer to as a fuel intake. Fuel is introduced to the cylinders directly at the intake valves by the fuel injectors.
on top of the intake
Yes
Yes
( 20.0 U.S. gallons ) according to my Chilton's book for a 1989 Ford Crown Victoria
About two tons.
No
On a 1989 Ford Crown Victoria : ( there are 5 lugs per wheel , total of 20 )
According to my Chilton's Auto Repair Manual : A 1989 Ford Crown Victoria has a ( 20.0 U.S. gallon gas tank )
There was one main safety concern of the Ford Crown Victoria sedan. The main safety concern of the Ford Crown Victoria sedan was the fuel tank sometimes were to leak. Another safety concern was the intake manifold defect which was also a leak.
http://www.modifiedlife.com/1989-ford-crown-victoria-car-radio-wiring-schematic/ any car audio web page will have diagrams
My Chilton's Auto Repair Manual shows : For a 1989 Ford Crown Victoria 5.0 L ( 302 ) V8 : ( 39 PSI ) * the 8th " character of the VIN is an " F "
lower intake manifold, 2 wire conector