Historical license plates in Ohio

I have a question for anyone living in ohio who has historical plates on their vintage mustang. I am going to be modifying the car and adding disc brakes rack and pinion steering and aftermarket suspension. The question is do I have to get rid of the plates and get regular plates for it?
I talked briefly with my insurance agent about doing these modifications and she said as far as the insurance goes i can do any modifications i want, the only difference being if the value changes i would need to up the coverage. I intend to up the insurance value of my car from 9 grand to 15 grand after all the mods are done. I have added torque thrust wheels and new tires as well.


http://pg.photos.yahoo.com/ph/jamison42166/detail?.dir=9e20&.dnm=906ere2.jpg

my car is the early 65.... as far as im concerned it will still be an early 65...but with modern safety touches. i am adding TCP front coilover suspension, rack and pinion steering, subframe connectors and adding disc brakes to the front.
when i registered the car at the DMV here i remember the lady (flaming man hating bull dyke) getting pissy with me telling me im only allowed to drive the car to car shows and such not for a sunday ride etc... she said im not allowed to do any modifications to the car etc. I later asked my insurance agent about it as well and she said dont worry about it they dont check for that.
here in ohio historical plates never expire its a one time fee. funny when i was in the DMV registering the car, Shirley Basseys Goldfinger came on in the background which was one of my dads favorite songs. Since i inherited the car from him it was kinda like he was saying hello and have fun with the car.

I did email the DMV and asked about the plates and they said the following:

The answer to your question:

i have a vintage ford with historical plates. I am considering safety upgrades such as disc brakes, adding emergency flashers and an aftermarket suspension. do I have to lose the historical plates because of this? and if so how do i go about exchanging them? my insurance agent said with my exibition auto insurance i can do any modifications without affecting the insurance.

Is:

The modifications has nothing to do with Historical plates....as long as the vehicle is over 25 years old it qualifies for Historical plates.