With all the money you've put into mods - several thousands in many cases, how do you deal wth insuring it? It becomes a bigger deal for those with older cars and more mods. Example: 99 SSEi with a Level 3 Intense package plus a performance trans rebuild. A $5-7,000 car can easily become a $11,000 investment - obviously WAY more than insurance would cover if your car is totaled and unsalvageable.
So do you let the insurance company know about your improvements? Aside from causing your insurance to rise from the car being worth more, will they be more suspicious of your new "performance" vehicle and get you on that too?

i dont even have full coverage on my car....reason....its 13+ years old....and yes...I have more mods done (audio, neon, and other SSEI upgrades custom mods) than the car is even worth....the mods of the car prolly are double of what the car is actually worth....would i ever get that back if something happend....nope

and the 03 only has fire and theft since its parked for good as of right now

I had no collision, put a few thousand into my engine, and when I totaled my car I was able to take anything I wanted. So, I took the engine, trans, entire wiring harness, wheels, aftmrkt spoiler, seats, door panels, and other misc stuff.

I haven't really heard of anybody who has insured their Bonneville or GP as anything different than a stock vehicle. There are probably some guys out there who want every penny of their investment insured, but it isn't worth it in my opinion. Leave that stuff to classic cars and exotic/rare rides