Hello Ciccio,
Are you italian? I just wonder this because my english is not very good... so.
I may help you for many steps because I am ending a full restoration (chassis off) on my 1961 corvette.
If you wish you can take a look on a short video (body drop timelapse) by this link :
https://www.youtube.com/watch?v=xsGglGCO6qI
I saw that Roy sent you some links, those helped you?
First thing I will hardly recommend to you is to take many pictures of all parts before removing them, even when it seems to be too easy with the time you will forget how it was made and you will loose many time searching about stupid details.
Second thing is to check what is right and what was modified along the plus 50 years. Also make separates boxes (like radiator area etc.) with the old parts and never trow them before ending the whole work.
Buy an ST12 book you will find it in many corvette parts sellers websites.
About screw, bolts, nuts, shims etc. the old one are a treasure if possible give those to a person that can restore them, because in most of the cases when you buy new hardware it is not exactly as it was as original... and it will be a lot more expansive! Also take pictures with the parts that where attached with.
For electrical wire take again pictures and write on scotch where it was connected, buy all new wires it will save you the nightmare of having the car on fire.
The body is attached on the chassis with 12 bolts, 8 are under the carpet and the rear seat area, 2 in the trunk under two sides plates holded by two screws and 2 are in front under the radiator support, these are the only bolts sustaining the whole front body. Save the shims to remember how many where in place but buy a new set.
One of the worse part to take away from the car should be the rear bumper bracket the one which is across the whole rear but it is doable...
Before going forward I will wait on your reaction to know if you have found it useful.
Best regards,
Ferry