Swapping a 360 from A-Body/auto into a '78 Dodge Van with factory 318/4 speed - Advice?

This is a really easy swap so don't get your underwear in a knot,lol.
Although; the van won't need the 4-speed anymore, and I would consider putting the 727 into it. That swap would be a little more detailed,tho.
No way I would want to ditch the factory 4 speed, that's what makes the van so much fun to drive, and rare too!