during our race in Le Mans, a sudden drop in fuel pressure caused an extremly lean condition at full throttle, which burnt a hole in one piston and also damaged the top of a cylinder wall, burnig like a passage between two chambers through the head gasket. This took off about 1/8" of block and cylinder head material.

While repairing the head is no big deal, as it is aluminium, welding the 1/8" of cast iron material back on the block is not that easy.

Would you know what type of iron they used to cast the HEMI back in the day?