casted wb evaporator mod

[Overbrazil]

Hi friends, i am planning to try my first direct die refrigeration
remove a home made casted block. Suitable for DD ?
cheers
http://www.terra.com.br/fotos/foto.cgi/NAsmtvNFG6WkY:wS7tpOH-FQiz70XzYZdjktixuSCJVeo-/p1010011.jpg