quick question

darthanakin23

I bought a 2010 nismo Z with 1600 miles on it and traded in my 40th anniversary and I know how dealerships roll people out in cars without full funding, but I asked numerous people at dealership, including the GM and I said I'm going to get a supercharger put on and want to be sure its fully funded and they said my deal was done electronically and its fully funded so go ahead and modify the car anyway I want...would you guys not worry about them asking me to return the car because of funding since that's what their saying? Their saying its 101% done and I would think if it was actually funded, they wouldn't give me the ok to mod the car and its been 4 days since I bought the car...am I stressing over nothing? My moms credit is over 750 and no stips were needed.