I have a 1973 Pontiac Grandville convertible I got from a friend..... It is in rough shape and I can't find any numbers on the engine and I do know it's a V8 and I was wanting to know if I could get some insight as to what size engine the car has.... I am thinking it's a big block 455 and I was also needing some info on some possible sites that you can enter the VIN to find out more on the car.... It is kind of a odd VIN number I thought they was supposed to be 17 digits but my VIN is 13 digits long ....Any help with these issues would be great.... And thanks in advance...