Suggestions for new design Aluminum Mopar SB clean slate (kind of) cylinder heads

We have Renishaw RemAM 500q printers at work, used for mostly aluminum. But only have a print volume of 10x10x13, the machine costs $250,000 and the parts require all the normal machining. Something big enough to print a head, like a GE Concept Laser X, they're over $1,000,000
For the print volume restriction you might be able to split the head in half and then connect water jacket externally? I just bought a Bambu 3D printer that will do a 10" cube and if I ever get to the point of having a head flow machine, I'll be trying to model up some different port, bowl, and chamber shapes. But my CAD competency needs a lot of improvement first. Unfortunately the best I can do is some carbon fiber reinforced filiment, nothing in metal.