I had Large Modern hens, not bantam... they were much bigger than my Americans.Modern game are way too small in my opinion to be used for any crossings. Just my opinion, and I know shamo and Malay would be hard to breed with a American game it would have to be a laying pullet or simply fertilize the hen myself.
I plan about 10-20 year breeding program to make my own special upright fast but yet merciless fowl.
Be nice to get a Rhode Island Red color to the roosters fully, tail as well, would be a beautiful plume.