There is MUCH value in having an insurance agent you trust in matters like this.
IN MOST CASES... When a vehicle carries collision, uninsured motorist, or comprehensive coverage. The damage usualy needs to reach a "threshold" (75% in most states) of the actual cash value before it gets salvage title branding. Also, there are isolated cases where the insurance company will total a car because of the type of damage but it will not get a salvage title because the numbers dont require it.
Actual cash value (with name brand carriers, i.e. allstate, state farm, geico) is more than just Kelly Blue Book. They actually pay a 3rd party company to see what cars like yours have sold for in the area. Deductions or Credits are given based on your vehicle's milage, condition, and options. This being said... it may still end up being less than what you feel your vehicle is worth -- hince the availibilty of an agreed value policy.
There are specific rules for each state.. Each state has their own querks.
In Texas for instance, a collision who's damage minus taxes is 75% of the actual cash value will prompt the state to issue a salvage title, but hail damage that is 200% of the car's value will not. Each vehicle and state should be viewed on a case by cases basis.
My suggestion is to have comprehensive and uninsured motorist coverage on all your cars. If you can afford liability coverage, you can likely affod the extra 30/month that will cover you if the car is stolen, dropped off a trailer, or hit by an uninsured motorist.
If you have the FJ fixed up, or are worried that your car is worth more than a market analysis says - then look into an agreed value policy with a main stream company.
Just my thoughts