May need advice on 727 build

Hi Again This is Where I got the approx years of my transmissions

http://smrtrans.tripod.com/smrtransmissionsintro/id53.html.


So I have got one of Each , Rebuilding the Later 71 unit but wanting to use the front four Clutch Retainer out of the early Trans, which looks the same trans as the one in the left pic, as the later clutch retainer is only three clutch