Cummins question

[Rammerjammer]

Looking at getting a cummings out of a M3A1 and the title says that it needs a head job. The mechanic that is going to be working on it is wondering if it is aluminum or steel? Please let me know

 

[gimpyrobb]

Might need more info:
M3A1 - Wikipedia, the free encyclopedia

 

[WillWagner]

They are cast iron. Got a pic of the transplant?

 

[Rammerjammer]

No pics of yet in the design process. Going to be tracked and be used around the swamps in south Mississippi