The engine above in question was found to have a couple of severe cracks on the engine block around the welsh plugs rendering the block unsuitable for the blitz. I have sourced another block and another engine which I will post in another reply. I did however find another I Bar beneath the block build stamp.
I understand the II is for a 261 but anyone know why there would be a single I bar on the block and the head . The block ID is below:
Thanks for your help.