What is the fifth alphanumeric position in your complete VIN? An 'H' , 'Q' or is it an 'S'??? What the block stamping tells us is that the engine is a 1974 installed in a car built it Atlanta with a sequential body number of 14518. It is likely a 351 Cleveland engine... but you can tell us a bit more with the letter that appears in the fifth alphanumeric position of the VIN...
I wasn't clear enough - the full VIN is going to be something like a script 'F' and then a sequence starting out 4A47?14518 and then it might have another script 'F'. It will appear on your title, the door pillar data plate or the title to the car.