65 Valiant swap 273 to a 360

I am thinking a 727 will not fit.. I have a 65 valiant with a 904 and it is already snug
The pinch weld will have to be flattened to make room for the 727. I would like to use my cable shifted 904 from the original 273 engine but I don't think the converter will work with the 360 crank?