Nope, it was definitely substantially larger than 18mm head . I think it was 24mm or 15/16 ? It was late, but I know it wasn't the 18mm I had been using for all the other stuff! LOL
OK......Rods- Brazil - $150 - Block will need bored- $150 - Crank- fine - might polish, but no defects - $150 - Front housing - 12V PPump conversion? $150 You all need this! LOL