yes.
No, different electronics/sensors.
Yes
You'd probably go with add-a-leaf springs, replace the pittman arm, replace the shock absorbers.
250hp
no, wrong offset, check out crownvic.net
From the outside.
According to the 2005 Ford Crown Victoria Owner Guide ( 5W-20 ) * with engine oil filter change , 6.0 U.S. quarts of 5W-20 engine oil
The 4.6 litre V8 engine in a 2005 Ford Crown Victoria has ( 1 timing CHAIN to each cylinder head , so there are 2 timing CHAINS )
I would suspect they WILL fit. If the lug bolt pattern is the same, which I am 98% sure that it is, they will fit. Check the lug bolt spacing to sees They have different back spacing and stick out too far. But they will fit on the car.
On a 2005 Ford Crown Victoria , the Mass Air Flow Sensor is in the top of the engine air filter housing just before it connects to the big engine air intake tube
burnt bulbs, switch or fuse.
According to the 2005 Ford Crown Victoria Owner Guide : In the fuse panel below the dash , on the drivers side : ( # 27 is a 20 amp fuse for the cigarette lighter , OBD II , and power point )