Engine swap, new K-member or swap kit??

The 904 off the slant 6 will not bolt up to the 360. The bell housing is different. If you already have a 904 off a Small block v-8 it will bolt up and in with no modifications. I am not sure about the 727. If you are keeping the stock rear end in the car, you don't have to worry about shortening the drive shaft. If you deciced to get a bigger rear end, then the drive shaft will have to be cut to fit.