97 crown vic: universal tow bar through plastic bumper cover to aluminum beam with loops of chain bolted to frame to prevent colapsable mounts from separating. How durable is this? I have to flat tow it 1300 mi. (A former trucker with a knack for gentleness)

You can get a DIY kit easily. There are 2 basic types out there, one which mounts outside the rear bumper and is visible just below it, and one which mounts behind the plastic bumper and is not visible except for the tongue. This however requires fitting by removal and replacement of the plastic bumper, and complete removal of the steel core of the bumper to make space.

Bumper bar? Skirt?
There is a bumper reinforment behind the bumper cover.
Front or rear???
Either way there are some plastic retainers on top. You may need to remove a grill which would have some sort of retainer. The retainers usually have a center section that prys up some and the retainer will then pull out.
There should also be some retainers on the undersides of the bumper covers.
There is just about always a bolt going up through the bumper cover into the rear quater panel or front fender right in the wheel well edge. Sometimes there is a guide that the cover slide onto as well. You may need to remove the tail lights. There will be nuts on the inside behind the trim panels or the headlights. they usually have some clearly seen bolts holding them in (about 4 give or take)
Unplug any lights and they can usually be left in the bumper cover.
Then off comes the cover.
From there you may find a styrofoam pad. Don't lose that as it helps the cover keep its shape in the heat. And either the reinforment will be bolted or welded to the frame rails.

Most of the ones I've seen bolt to existing frame holes around the radiator supports. There are a few brands that require some drilling. All come with detailed mounting instructions, but if you have a specific brand I could tell you the specific mounting locations.

I am going to use a Crown Vic as an example because we do not know what type of vehicle you have. On the Crown Vic there are rear stabilizer bars(sway bars) which go from one side of the body to the other. On each side there is a bolt with many rubber bushings which are meant to prevent the car body from shaking and rolling in turns.

Looking from the back of your car you will see the bar hanging down before the rear axle. One side, if not both sides have broken bolts. They are called suspension links and they are readily available at autoparts stores. You also have similar sway bars in the front. The front set bolts to the frame in a different type of mount.

You can have bad shocks or struts, moreso on one side as you indicate the problem is with left turns. On the extreme condition, a balljoint or tierod end can cause sloppyness in the body on turns.

There are some differences with rear suspension on front wheel drive cars and AWD vehicles. But is you see a bar underneath your vehicle just check out if it is still attached. I hope you found my solution very helpful and would be interested in your outcome.

On those, you will need a pair of "tow tabs" that mount to the front frame. Same setup is commonly used to flat tow race cars. The bar will generally attach to the tabs with two pins with clips that keep them in place. Unless you are making the bar yourself, the tabs are sold with the bar. I have seen "rental" hook-ups that attach to the bumper but those are not very safe compared to a frame mount.

Use the same bolt holes the front bumber uses. You may have to build a bracket that attaches to the frame horns where the bumper mounts and using longer bolts (grade 8) pinch the bumper between the mount and the frame horns. Attach your tow tongue to this mount.

Hello pepper524: My name is Roger and I will help you. If your car is fuel injected. Your car has two fuel pumps. A low pressure pump in the fuel tank that is a 10 psi. lift pump. You also have a High pressure pump mounted on the frame rail that is a high pressure pump. I
If your car has a carburetor then the engine has a mechanical fuel pump mounted on the right front cover of the timing chain cover.

Don't remember if you need to remove outside cover to get to it (some trim frames have an access notch) but there is one adjustment in the center top of the light frame (up/down and one on the outer edge of frame L/R) you need to adjust both because as lamp changes position it pivots slightly on the other adjustment.

What rims are on the car the steel police ones and what tires are on it could be hitting the stops on the frame and where the proper bolts put back in on the rack mounts and did you go with the heavy rack for the police car .Cause when I built them there was an issue with the proper bolts and there was a different rack for the cop cars the to the basic crown vic do to the suspension upgrade on it and the diffrent pump