I recently acquired a couple of transmissions and a bell house. These are supposed to be for trucks. The 4 speed I know is, it’s number is 591953, I believe it is an older sm420? The other I believe is a three speed, number 591816? Or 691816. The bell house is number 3835201. What do I have, what year range, and how desirable are they? Any info is greatly appreciated.

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