[Excaliber]

Head CC was 72-74 which is standard size for a 1964 high rise head. With the zero deck and MINUS 17cc dish on the piston the new C.R. is 9.8

Even looking at the pin's in "real life" you can't really "see" the difference. It seems to be a combination of piston top height as well as pin height. All the numbers went to Arias and "somehow" they got it right!