They were installed in those vehicles, but the '83--'87 versions sucked to various degrees.
My preference is '88-'89, new enough to have the auxilliary valve body and many other improvements, old enough to have the pressure ports on the passenger side of the case.
You'd probably want one that came from behind a V-8 rather than a six-popper. The guts will be more heavy-duty. That said...all it takes is money to buy all the best/strongest parts and you can build up a 700 from a 2.8L.
Basically, anything new enough to have the aux. valve body is a good core; but if you go "too" new, you run into the electronically-controlled 4L60E/4L65E; and then you need a computer to automatically shift the transmission.
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