what all is needed to convert a farmer 4spd to an auto

[67cst]

a friend of my dads has a 71 gmc shortfleet 4x4 with a farmer 4 spd and he wants to convert to an automatic...the truck has a 327 in it, he isnt too famillair with these years of trucks so i said id find out all the stuff he needs to do the swap, so far on my list ive came up with :

1. th350
2.auto crossmember
3.tranny linkage
4.automatic steering coloum.


what else is in there...will an auto tranny bolt up to his transfer case? what about a different driveshaft? any help would be great asap!! thanks guys

DEREK