You don't. The Idle is controlled by the ECM. There are no idle adjustments
No, different electronics/sensors.
yes.
It should be a direct swap.
In the 1999 Crown Victoria the LCM, Lighting Control Module , contains the relay for the turn and hazard flashers. This located under the dash.
no, its a different design
5x4.5
Yes.
According to the 1999 Ford Crown Victoria Owner Guide : With single exhaust ( 200 horsepower ) With dual exhaust ( 215 horsepower )
can 5.0 engine fit in 1999 crown victoria
On a 1999 Ford Crown Victoria : firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of vehicle ( if that is what you mean )
6x8
190-210