That sucks dude... funny how the vultures are lining up to strip her down though
Heck, you could probably make your money back on whatever you pay to get it back from the insurance company by parting her out....I have seen that done a couple time and it worked out good for the seller....
For a 99 you should be able to get some ok cash. Here's what I did last year when the same thing happened to me.
Tell the insurance agency that you want to keep your wrecked rig for a week or so to get all your goodies off. They may fight you over it but tell them that they aren't paying for everything that's on it so you are keeping it.
Pull ALL your stuff off. Put stock springs back in, pull the lockers, etc. The only stipulation that the insurance company put on it for me was that I had to replace with stock every item I took off. I almost followed that; it had no radiator (took my GDI), had no brakes (pulled my 8.25 with disc brakes and locker and replaced it with a $100 junkyard D35 with no brakes), had a big hole in the passenger floor board where the front leaf spring bolt broke from the wreck) and picked up some stock springs from a buddy and found a cheap ass, dry-rotted set of tires at the junkyard.
Within in a week I had replaced my 94 with a 00 and swapped every item over and upgraded most.
It sucks that you have such a low mileage engine! With that being the case it might be worth it for you to purchase it from the insurance company and if you feel up to it swapping it into your replacement, or storing it for future use.
Good luck with what ever you decide to do.
Mitch