Engine swap 318 to 360

Hello,
I have recently been researching an engine swap in a 1974 dart custom with the 318 and plan to switch to a 360. I know I have to have a suitable flex plate, and torque converter. Today I found the 360 and everything I need although it is in a 1 ton Dodge van. A few questions I have are the following; since it has the 1 ton 727 transmission, will it bolt straight to my 727 in my dart? Also since it being in a van will it bolt up to my engine mounts? Also, do I need a different wiring harness since it's in a van?? Any help would be highly appreciated thank you.