360 into 73 Swinger

Driveshaft? same trans being used?
If the slant six car had the 904 behind it, then the 904 behind the 360 will bolt right in and use the same mount and driveshaft. Unless the above is true? I never heard of this but I guess it is possible. There's a few weird things out there I discover from here.

If you have the Schmaucher swap kit your good to go, been there done that.

Describe the rear by way of how many cover bolts on the rear. It is probably a 7-1/4. It would be really good to have a 8-1/4. There plenty strong and inexpensive.
A 8-3/4 is great to get and way way stronger but a bit pricey.

Fuel line?