72 318 Scamp. Low oil pressure 1 minute after startup.

The 360 has a longer stroke and that is the big benefit... better torque in low and mid range.

• Flexplate and or torque converter need to be changed as the 360 uses external weights in back and up front to help the balance (called an 'external balance' engine). Since your flexplate is busted, then just get a B&M one for the 360 in front of a 904 and use the present TC.
• IIRC, motor mounts may need changing or adapting on the left side.... I bet someone can confirm or deny that.
• Oil pan may need to be changed on the 360 if it is from a truck or van; the 318 and 360 pans don't interchange.

Of course, you don't yet know what kind of basket case the 360 is, or is not!