It will fit, but you will have to worry about the computer.
Yes
Yes
It will, though technically it is illegal to istall on older motor into a newer car for emissions reasons.
how do you get to and replace the wiper moter on a 97 marquis
It is a Mercury and Mercury is a division of the Ford Motor Company so...technically it is a Ford.
change wiper motor grand marques
( 5 quarts with filter change ) according to the 1999 Mercury Grand Marquis owners manual
Take it to a repair shop.
For a 1995 Ford Crown Victoria : ( 5W-30 engine oil )
Yes. Both are 4.6 L
I believe you are looking for blend door actuator???
it is on the firewall and difficult but not impossible to get to and replace.