Pearson 365 and 367

Thank you both for the answers and that great schematic of the 367 Seadragon. . I would imagine that there is lead in the 367 also, since I think both versions (365 and 367) where built concurrently through 1981 to 1982 (years the 367 was built). Is this correct?
Regards.

Can anyone please tell me if the keel on the 367 (cutter) is bolted on or is the ballast integral? Is it lead? Does she also have the hollow part in the rear section as the 365? Any schematics showing differences between the two models?
Thank you for your help.