700R4 is a cable shift, has a different bellhousing (is removable(maybe thats 4l60?) but an adapter would a better option), don't know about the driveshaft, but it would probly need to be modified with the 700 yoke. You really only need an on/off switch to control overdrive. Neutral safety switch is no big deal, just another on/off you can use it or bypass it.
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