Don't have the parts but here are the part numbers that might help in your search. See the diagram below. The Ford vans didn't come with automatic but this setup can be used with the Ford transmission. You'll need a 6 bolt torque converter like came with the Ford diesel transmissions like the E4OD or 4R100. These parts used to be very common in the used market but have just about disappeared. They can be found new but the cost is frightening. The crank spacer is like $350, wave ring around $300, and flexplate $300. Around $1000 for the whole kit. Member RubeBonet makes a replacement for the wave ring that is vastly superior to the original.
Don't think so. That flex plate is a specific Cummins part and will fit either the GM or Ford adapter plates. One of the reasons it is kind of pricey is it was only used on the GM vans with the TH475 transmissions. Not aware of any other applications. It has 146 teeth and is the same diameter as the manual transmission flywheel. The only other option for a Ford automatic would be use a Destroked engine adapter and custom flexplate. That setup is around $1600 and would use a big block transmission. That is one reason we see very few swaps with a Ford or GM automatic. Most use one of the Dodge units since all the parts from a 5.9 will fit the 4bt.