Detroit engines ,you like....not mopar...

twin H 170hp 6 cylinder hudson
flat head ford
302 6 cylinder gmc
6.6 403 and SD455 pontiac
6BT cummins
NH 275 supercharged cummins
8V71 318 detroit screaming demon
BC3 400 cummins
1693 caterpiller
3406 A and B caterpiller
KTTA 750 cummins