differences in 727 transmissions

Elwood blues said

so right now i can either pull the one out of the 68 new port with the big block housing or i found one is a 74 dodge van but i'm not sure if it would have the long or short tail shaft on it. I think i need the long tail shaft to make it work? but im not sure could someone verify that.

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Can you get a picture of the van transmission tail housing.
If it has the short tail housing you can use the one from the big block if it has the long tail housing. Need a picture of it too.
Nevermind on the big block transmission picture , it's coming out of a car so it's a long tail shaft.