Compatibility

I have a quick question. Not being really familiar with the 4spd compatibility side. Theres a guy selling a 4 spd that he's been told is out of a late 60's A-body. No linkages, just transmission. C95664j is on the shifter side along with 3-7, c95639u on the passenger side. Tailshaft has C95658P along with 8-17 4 bolt yoke hanging out the tail. Is this a 4 spd A-body, will it work in 70-76 A-bodies? Third, is it worth $250 if it is all he says and fits my needs?