Would the head have to have a small block chevy stud spacing to accommodate the small block chevy offset rocker arm shaft setup? Did you have a specific setup in mind? Can all that still be compatible with the original small block chevy rocker arm and stud arrangement required by the original guidelines from Johnny. I'm guessing that you are thinking of this being an upgrade to the orginal head that is used along with a cnc upgrade or something like that where offset pushrods would be needed. Are you thinking raised port or not? If so is there a way to do that and still fit a la/ magnum head? More details on what you are thinking please.