What automatic transmission would a 70's Chevy automatic truck have?

I know this is a vague question, but thats all the info I have right now. Its a 70′s model Chevy truck automatic with a 350 in it.
Thank you.

I know this is just as vague but would it be long shaft or short shaft? I’m looking to do a engine/tranny swap from a truck I know of to my 91 Camaro.

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