My 1970 Cutlass Supreme

This is my 1st car, bought it 4th of july 2009 with only 72,000 original miles on it. 1970 cutlass supreme 350, not much done to it "so far" it is a origianl numbers matching car, but o would like to up grade to a 455, and save the original engine. im not 100% sure if its a rocket or not i dont belive it is beacuse it didnt come with dual exhaust or anything like that but ive never looked into the codes to the car to see what it originaly had, all i know is what the last owner told us. he had painted the car to the color it is now which id like to change to black.
Side View
Page 1: your here
Page 2: interior and msc
Page 3: engine and mods