Advice about a 360.
The 727 does weigh in a bit more than the 904 does but not a level to be concerned about. Also, when building a. Engine, the state of the trans can be more of a factor than what trans is behind the engine. I have no issue with putting 400HP behind a Otherwise stock 904. So long as it is in good shape.
The 727 uses more power to turn. It is not a lot. On race rides, it shows up as a tenth in the 1/4 IIRC, as reported back in the day. You'll never know, see or feel the differance in the street.