Another issue that is often ignored is the sprag or over running clutch. If it lets loose you could crack the case and you will be building another transmission(ask me how i know this). It's good insurance to get a bolt in sprag this will keep it from spinning and possibly cracking the case. Some also are built stronger than the stock ones and can handle more.
https://www.coperacingtrans.com/?product=crt-727-16-roller-drag-sprag isn't that Sprague a stock Ford?
I seem to recall that being stated on here years ago: work: Sorry for not remembering the exact application, C6,C4 or ???
