SU carb woes and engine rebuild

[ALAN_COSTICH@HP-USA-om11.om.hp.com]

Item Subject: cc:Mail Text
          On 02May "Allen W." wrote, "Old head cracked so I used one
          from a 69B(would rather have the later model "big valve")".
          
          So, who can give me the casting number or part number for 
          the "big valve" head?
          
          Alan